On the Daz website there's also a link to free stuff. I found several things I've had before and then somehow lost, so I downloaded a horse, cat, lion and dog today... Not that I ever use anything but the humans. I didn't see any free people* at this time which is odd. Usually all the old models are available for free. Or at least some of them. Also you'll sometimes find free stuff for Daz on the DVD that comes with the magazine, but it's usually clothes or mechs and of course the clothes require you to already have the people models...
I don't get a preloaded model when I start the program up, but I've never tried a version of Daz that didn't have at least one Victoria model in the content tab. (But I see I still haven't installed Daz 4 - can't remember when I downloaded that version, but obviously I don't update the program much...)
EDIT:* there were free morphs for people I think but remember that you need the right models to use morphs. (Just like you need the right models to use texture packs - took me a while to get the hang of the downloads when I first found Daz.) If it's ever named "for" something or other, make sure you have the model it's made for before you buy or download.
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