Yes. All Rock Band games are compatible with all Rock Band controllers as well as Guitar Hero World Tour controllers.
Yes.
rock band 1 drums does work for rock band 2. guitar hero drums also work on the rock band games. ( the orange is a blue note )
No. Rock Band 1 doesn't have the option of cymbals.
yes they will.
yup.
Yes
Yes, it does
It doesn't work with Rock Band 1, but it works with Rock Band 2.
yes, In fact the rock band 1 set is more durable and works better then the Rock Band 2 plastic instruments.
most probably
yes. and vice-versa.
yes
no. RB1 drums dont have cymbal outlets