I have heard you can kill other people ingame.. how can I kill someone? how can I avoid getting killed? What does dying involves? does my character gets wiped?

Certain special items or abilities can give the power to kill someone. It's unlikely you'll be killed at random, but trespassing in Necrovion can result in your death. Your character doesn't get deleted, but actions are limited while dead, and you will have to find a way to get revived or revive yourself.