I have toys I can play rough with my monsters with, like fishing pole toys from the $1 store. An absolute fave is a (longish) ankle sock, turned inside out so the terry faces out, and stuffed pretty solidly with polyfill and catnip. It's big enough for punching, rabbit-footing, and good, mouthy biting, yet light enough that it can be fetched and toted.

When he bites or rabbit kicks you harshly, say "no," then play with him with an acceptable toy. If that doesn't work, say no then ignore him a few minutes.