for modeling try
Wings 3d or
anim8tor (free), for texturing and unwraping try
Lith Unwrap from Simples site (also free) You can make animations directly in DB or DBpro ...for example try my
Walker MECH demo, I was posting in DB discussion as source code:
http://darkbasic.thegamecreators.com/?m=forum_view&t=8590&b=10&p=0
If you want to spend some money buy
Milkshape, you can model, texture and animate in one program.
And ...read manual of DBclasic -its much better and complex than one for DBpro and most thimngs there apply for DBpro as well. Try examples and play with theyr code ...try whats happened when you modifi something or remove it ...this way rou can learn about each command. I recomend to go through each command in 3d section. Most things about DB I learned in its manual.
And finaly there are some tutorials at DBpro site ...look at them.