Eragon

ok what i need help with is that i need to know what program is good for making ragdolls and props because i have no clue on how to make any so pleas some on help me!!!

and i need help on how to use it

There are many choices! My favourite modelling program is 3ds Max; it’s industry standard software and has recently been made available to students for free!

If that you don’t fit the criteria, you can check out these free alternatives:

Blender (free and supported by a large community)
XSI (free and endorsed by Valve)

Those last two links include some documentation and the plugins required for making Source models. Getting a modelling program and familiarising yourself with it is step one!