help...putting music from ipod onto new pc

ok...kinda a long story. I got my ipod and put all my music on it through my home computer. when i brought my ipod to college and downloaded itunes onto my new pc, all music was gone. so i went back home and got it all back on there. but now my battery is dead, and i need to know how to get my songs onto my new pc bc i can't go home everytime i need 2 charge.