Have a look what the school will provide you with and fill the gaps with your own kit: combination wrenches ( mainly S.A.E.), 3/8 socket set, slotted screwdrivers and philips head screwdrivers ( #2 philips especially ),
flashlight (explosion proof if you can find one), safety glasses, ear plugs or
hearing protectors.....and for %&^$$! sakes get some steel toed safety shoes or boots
The school bookstore probably will sell you all the aircraft mech. books you need - be warned they might set you back quite a bit $$$.
Hope this helps, and good luck with your studies.