The regular V3 can use many of the same items V3 RR can. They take the same clothing, textures, hair, and poses. Morphs won't work.

IME, the people who get stuff on their wishlists bought for them are people who do have friends here. Their Rosity friends buy them stuff for birthdays or Christmas or just to cheer them up, as friends do. Also, people who contribute a lot to the community (post free stuff, make models for people who ask for them, etc.) may get gifts to thank them. Just begging in the forums isn't like to get you very far, I'm afraid.

DAZ/PoserPros does give out coupons/gift certificates/vouchers sometimes. They are sometimes enough to buy things, especially when they have special promotions, like PoserPros' recent Halloween thing.