No it's not nessicary but it will improve your song library if you own the wii, Xbox 360, or the ps3
okay if you what to play with the drummer you need the rock band controllers and the drums
no, or they wouldn't sell Rock Band and Rock Band full set separately...
You need a plastic guitar and the rock band disc.
no. but you need a guitar, or microphone and controller to play
yes you do
Yes.
You can play Band Hero Drum with Rock Band 2, not rock band 1 ( you have to transfer the songs from RB1 to RB2 to play with Band Hero Drums)
You can play band hero instruments with rock band 2.
There is no Rock Band 4.
You can play Rock band with a guitar hero guitar, but you can't play Guitar Hero with a Rock Band guitar.
Yes, PS3 Slim can play Rock Band.
you have to get a rock then a band