managing keyframes and reusing animations

Hi, I'm working on a cutout TV series in AE cs6 using the puppet tool, and am missing a few features I am used to from flash:
1 - is there a way to push forward (or backward) all the keyframes in all the layers from a certain point (like F5 does in falsh)?
2 - if I want to re-use animation from other episodes. is there a way to import the animation without re-importing the source files (which are similar in all the files)?