-Pliers. You'll need two pair. I found that it was really handy to have both a regular and a needle-nose.
-Wire cutters. My pliers have integrated wire cutters.
-File/Sandpaper. If you don't have, you could use any rough, hard surface you don't mind scratching up.
-Hammer. Not absolutely necessary, but could come in handy if your wire is particularly thick or hard.
-Coat hanger. That's it. Any one will do, with any kind of finish. Mine was old and rusty, yours could be new and shiny, but know that it will probably get a bit scratched by the pliers unless you're really careful. Edit: My cousin gave me a good idea to wrap the ends of the pliers in electrical tape. Doing that will avoid scratching, and might make slipping less likely as well.
-Safety glasses. Very important. You don't want a sharp piece of metal flying into your eye.
-Gloves. Also very important. Pinching your skin in pliers could be nasty.