1. How do I use this?
Here's my YouTube starter series!
And here's a tutorial index, although it can be harder to find things if you're brand new to the program.
Searching for "Daz Studio" on YouTube will also find you a LOT more tutorial content both by Daz staffers and by other Published Artists.
2. What's the difference between Victoria 4, Genesis 3, Michael 5, etc.?
This confuses a lot of people new to our market.
SHORT VERSION: Basically Daz has "figures," and Daz has "characters." A "character" is usually a dial or set of dials that changes the shape of a "figure" within the program. Characters with number 5 after them are dialed morphs of Genesis (Victoria 5, etc.), 6 are morphs of Genesis 2 Male or Female, and all the very numerous 7's are morphs of Genesis 3 Male or Female. Morphs are not directly interchangeable between males and females on any figure except Genesis, and they only work on the generation they're made for.
If you want to know if a character that lacks a number is for a given figure, you will have to read the description on the product page. With few exceptions, a character only works on the figure for which it was made.
The latest "figures" are free with the Starter Essentials you hopefully downloaded with your free copy of Daz Studio (currently Genesis 3 Male and Genesis 3 Female). Each figure is a separate standalone mesh that can't wear clothes for the others without a conversion process that, up until Genesis and AutoFit, required professional skills or paid licenses for a program called CrossDresser.
They are, somewhat abridged and roughly in chronological order:
Michael & Victoria & Aiko (The first Stephanie was a female morph of Michael from what I can find)
Michael & Victoria 2
Michael & Victoria 3
Hiro & Aiko 3
David & Stephanie 3
Michael & Victoria 4
The Kids 4
Genesis (androgynous figure)
Genesis 2 Male & Genesis 2 Female
Genesis 3 Male & Genesis 3 Female
Slightly more history is on Wikipedia.
Starting in Generation 4, most characters are now morphs of the figures and are not free (Kids 4 was the only other standalone).
A morph changes the shape of an existing figure and is presented to you, the user, as a dial. So, for example, Aiko 4 is a dial that you can turn on to transform Victoria 4. You can load an Aiko 4 icon from the library (and many other characters), but in fact it is just loading a version of Victoria 4 with that morph already turned on.
At Generation 4, official Daz character morphs started being called "Character Name + Number" to go with their parent figure.
So Aiko 4 and Stephanie 4 are morphs of Victoria 4; Hiro 4 and Freak 4 are morphs of Michael 4; etc.
With the first Genesis, ALL the named characters are morphs of the androgynous base - that is, Michael 5, Victoria 5, David 5, Aiko 5, etc., if it has a 5 it is a morph of Genesis (also the Troll and a couple of other creatures).
If it has a 6 it is a morph of either Genesis 2 Male or Genesis 2 Female (Michael 6, Victoria 6, Minotaur 6, etc.)
If it has a 7 it is a morph of Genesis 3 Male or Genesis 3 Female. Daz greatly sped up production of named characters with Generation 7, so the number of "Character Name 7" characters is higher than any previous.
3. I see a lot of things for previous generations are on sale a lot, can I use them all on Genesis 3?
The short answer, for a complete newbie, is "no, unless it's clothes for Genesis 2."
The long answer is "yes, some, if you are willing to do some work and buy additional helper products."
Clones for using pre-Genesis 2 items.
Templates for using things with a skirt/tunic.
Sort of use Victoria 6 textures on G3F.
Sort of use Victoria 4 textures on G3F.
Two-step pose conversion to Genesis 3 from other generations.
Here's a free way to do pose conversion and a discussion of pros/cons.
4. Can I make my own characters/clothing/etc. in Daz Studio?
No, not by itself.
Daz Studio is a rendering and content assembly program. You have to have mastery of modeling and texturing software to make anything but lights and basic morphs.
You do need to learn to rig in Daz Studio and use its Surfaces tab for applying your textures if you want to make content for the program (also see: YouTube channel again), but your models and textures still have to come from somewhere.
5. Can I make a living with just this program and content I buy or download?
You can make a living with a piece of string and a twig if you are very clever. Making a living from pre-created assets in a render engine isn't quite that difficult but it's certainly not easy.
People use Studio to make commissioned renders on deviantart. To do this you make the best-looking renders you can for your gallery and just post that you're available. You will soon receive many offers to make illegal commercial fan-art, awful pornography, regular-looking renders supporting a less obvious kink, and occasionally people's gaming or roleplaying characters. Almost no one makes a living doing this; mostly it might be a hobby or bonus income.
If you're interested in making porn commercially you can find some comparison renders and animations on Renderotica. I'm not sure if that pays more or not. Ask around over there.
People use Daz Studio to create book covers for Amazon or other self-publishing platforms. I have no information on how one gets in touch with authors or how much this can make (I've heard "an okay second job" but that's just a rumor).
Daz Studio is often used to make art for commercials or infomercials. If you're interested in that use you probably already have a Kickstarter or something and know exactly what to do here.
Daz Studio is used to make independent animations and graphic novels. These are very hard to monetize regardless of how they are made. It's especially hard to compete with hand-drawn comics using 3D.
Other commercial uses of Daz Studio often involve it being an intermediate between several programs in a 3D workflow, in which case you also don't need me to tell you what to do.
6. I manually installed a freebie/a product and it doesn't work!
Reinstall it using this guide!