There is the standard list of free modellers, blender, wings3d , anim8or , etc.

You can get a demo of Lightwave, restricted to 400 points per layer, but thats enough for some  nodels.

Truespace 4 I think they are giving away, www.caligari.com

Or things like Hexagon, Shade, Silo are available.

Most of these have demos , so give a few of them a try , you will find a preferance for the interface makes a big difference.

Best of luck with it .

There are a number of tutorials around , especially for conforming clothing. Its worth having a read of whats involved.