Find bones and copy animation

I am trying to learn from others’ .blend files (blendswap).
I am trying to figure out how the bones and their weights on Sintel Run:

I can see a some bones that I can pose but I can’t see their weight, and I feel there are some bones that are missing.

I am trying to mimic the animation to my model, is it possible to directly copy paste the animation? bone names requirements?