I'm in High School Marching Band (percussion) and Concert Band (oboe).
For percussion, I'm guessing you'd start on concert snare, or keyboard percussion.
For keyboard percussion (Marimba, Vibraphone, etc.), you'd need to learn to the notes. This instrument is Concert Pitch (C), so no transposing issues. The notes on the keyboard are the same as piano. If you are doing well, beware of learning the four-mallet technique. Cut-up and sore fingers ensued.
For snare, I'd recommend going to Vic Firth, and learning the "basics": One Stroke Roll, Paradiddle, and Flam. They become a good foundation to work on. See here:
http://www.vicfirth.com/education/rudiments.php
(My Biology partner is one level above me (Symphonic Band), and plays trumpet, and he's also a decent percussionist.)