I am still in the learning stages as well, so I don't presume to give out much advice. However, here are some things that have helped me out
.
Autobody Online
Schools
These are some books that I have. They are good way to learn some of the basics and tools.
HPBooks: Pro Paint & Body by Jim Richardson and Tom Horvath
Welders Handbook by Richard Finch
I have more stuff at home, but I am not quite sure what they are at the moment
. Anyway, race-rodz is right, the best way to learn autobody is to be around people that are doing it and doing it yourself. Tools are pretty dependent on what you want/need to do.
David