#1
ok my dad just got my an acoustic guitar*ive been playing electric for about 3 months but thats not important* well during moving i droped it and broke one of the tuning keys off...how much does a tuning key usally cost,*its a takamini*sp?* i think
#2
Not much. If you have a decent guitar shop near you that repairs guitars they usually have a big tub of keys. They will just sell you one that fits. Or i guess if you want exactly the same they can order it in.

JC