If I buy VPS and create Tor exit node there what would happen if someone did bad thing using my exit node? (terrorism, hacking goverment sites etc) VPS provider will share information about me to FBI or another goverment organizations or just will send abuse and block my VPS because it's obviously that I'm just an operator of exit node, not terrorist?
Some people ran into big trouble for what was done with their exit node. Others got away with it. It really depends on the jurisdiction, but also the context, and in particular the willingness of either law enforcement agencies or the privacy-defending organisations to turn a specific case into a story that will elicit emotional response from the general public and thus help in pursuing a political agenda.
So basically it depends. A lot.
Don't host an exit-node on boxes/property on YOUR NAME. You should remain anonymous when involving yourself with this. Atleast in the U.S. and maybe the European Union so far I'm concerned.