2006 Scion tC: So I only had the one key with the chip and just a key for the door i lost the chipped key and don't wanna spend the money at the dealership for a new one so I found a 2005.

My question is can I use the ECU the amplifier/coil ( think that's what it's called) and key out of the 05 in my 06 and do I have to change out the ECU also or can I just use the key & amplifier/coil with my ECU?

Thx