Where to start! Well since your getting Poser 5. It come with figures far beyond what you used in Poser 2 and has many features that will make the renders far more natraul looking then Poser 4. With the Cloth room you can make the clothes fit so they look like they natauly would. With the Dynamic hair that comes with it as well as more that is sold and that you can make yourself right in Poser 5. The hair is very possible, even down to move single strands. As far as the models you see being used. Yes they are 3D models and you can find alot of that stuff here in "Free Stuff". There's a link to it on the top of the page. For sale in the MarketPlace here, also a link at the top of the page. As well as many other sites that have stuff for free and others that sell. Down at the bottom of the sidebar you will see "Web Ring" there are many web sites that you can find things on.