I don't see why not if the animal is being a pest or nuisance.
Yes it just depends how well you place the pellet and the fpe on the rifle a head-shot on a raccoon is good and heart and lung shot is good but you should place the shot at only how good the gun and your own air rifle about 25-30 yards. Your rifle should have at least 1000 feet per second.
It depends on the size of the raccoon, but most likely not.
Medium size game like a fox or raccoon.
Yes.......
Yes:
well it depends what kind of projectile you are useing. to me it would sound like you are useing a air-rifle, anyway what every you are useing and i dont know why you want to what you want to do but just make sure you get a clean kill :)
Both can kill you.
yes
no it is extremely unlikely that is possible
Rodents and small birds
Yes but it may be unlawful.
Yes. But I suggest using hunting pellets.