You can't find Eevee in the wild, but you get one from Bill after you find him in Ecruteak City. He will head back to Goldenrod City after you talk to him, and if you go to his house in Goldenrod, he will give you Eevee.
In Pokemon Gold/Silver you need to found Bill in his house.
eevee
growlithe & eevee
You will get an eevee egg. That you can evolve into an eevee or the other eevee evolutions.
You make it hold a fire-stone.
8,960 steps
Poliwhirl, Shellder, Staryu, Eevee, and Lombre.
evolve eevee into an umbreon by getting max happiness!
There's an everstone you get at the beginning of the game. Give it to your eevee and level it up. The more you level it up the more likely you are to get a glaceon.
Breed eevee with a ditto. This works for both male and female eevees, although if you are lucky enough to own a female eevee then there are other Pokemon you can breed it with. Check http://www.serebii.net/pokedex-dp/133.shtml for a list
there is no eevee :(
You cannot evolve an eevee in to a glaceon. You have to trade one from Pearl, Diamond, or Platinum.