1 road condition, sandy or dirt roads will shorten the life.
2 lubed mine 4 or 5 times in the entire life of the chain.
3 once every year or 2
4 nothing, didn't clean it ever
5 regular chain lube, forget what kind without going out to look
6 stock mostly
7 depends who I ride with, a little of both.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!