www.gravimetricstudios.com
www.anim8or.com
Object creator has some textures you can use and serves as a very basic modeler. I recommend learning a bit of anim8or, and at all times, try to model as efficiently as possible, connecting the points and not letting ugly overlapping faces create flickering. You'll get it later, just have a look at those programs and their help files, they should help you a bit with getting started. And yes, they're free, except object creator is shareware. Just download the free version of object creator, don't worry about the brushes limit as there are easy ways to get around it.