No offense to the OP, but you should know by now that once people die, they usually stay dead. I can imagine you one day, in reality, killing your entire town, leaving, then coming back the next day and saying: "Hey, where is everybody? How come the town didn't reset?" God, that would be so funny in a messed up, homicidal sort of way.
I am?
I can so imagine http://en.wikipedia.org/wiki/Johnny_the_Homicidal_Maniac guy doing just that.
http://www.uesp.net/wiki/Morrowind:Din?
I really do need more information than three letters.
Oh, I didnt know that.
I have only ever played the companions questline once. Being a werewolf interferes with me being a vampire.
Nope they dead and there staying dead I hope you saved before you murderess rampage coss if not all I can do is
RPGs tend to work this way. You make a choice, you have to live with the consequences (or reload).
Even though Skyrim has very few traditional RPG elements, this one remained - and it's good that it did.