I just purchased Vocalise for trombone and piano and when it arrived today i realized that it was in C- clef. I have no idea how to read it, could anyone help me out?

in the same way that bass clef references f below middle C, and treble clef references G above middle C, the C clefs place middle C. everything else lines up from there. (the line that falls right between what I think looks like the butt cheeks is middle C)
www.emusictheory.com
has some cool drills for reading clefs