[jon462]

1. yes, of course.
2. Yes, since all created beings are equally important to God.
3. If necessary. I say that because it is entirely possibly the other race of people never suffered the effects of original sin, a humanity has. If this were true, they would be immortal and very closely in tune with God, as Adam and Eve were before the fall.
However, assuming they sinned and fell, then I dont know, God chose to save man out of mercy.. although I would assume he would do that for the other race, how can I know?
4. ^^^ If they never fell, as I said in 3, then they likely see Jesus all the time. If they fell, and God chose to save them, it would indeed have to be Jesus (the Son-God), he would have to die for them also, I assume.

To be honest, these are just hypothetical guessing.. the only true answer to #3 and #4 a Christian can give is "I dont know."