1. My parents were Lutherans when I was a kid but like, bad at it. Heaven for "good" people, hell for "sinners", but most Lutherans believe they are hellbound unless "God" chooses otherwise, who knows where or why or whatever. It's boring shit and a lot of theory based rather than some of the gods and whatnot here.
2. Depends on the death. I've died, violently, and I came back to life a few minutes after. There was no heaven or hell or pearly gates or whatever, there was just cold and darkness and then I was awake. Some people pass peacefully. And sometimes people die around me and I make it not stick :P
3. ¯\_(ツ)_/¯
4. I don't know if reincarnation is, but resurrection is. Guess it stands to reason, right?