Wii for sure.
No
no
no
For the Wii. For many reasons to be answered by themselves when you get it for the Wii.
No.
No, you can only buy additional songs if you have Rock Band for the Wii, PlayStation 3, and Xbox 360.
No unfortunately the instruments for rockbands are platform specific.
No. Wii controllers are wireless, and entirely different from those of the PS2. Also, Wii is of Nintendo, while PS2 is from Sony.
No, you can't use controllers between different consoles, but only with the same console. So you can use Guitar Hero PS2 controllers with Rock Band PS2, but not Wii.
No, it does not have the right connections.
no because wii is compatible with no other console than GC
No just Wii PS3 and Xbox 360