You can't make it transform in Pokemon Black, only Black 2 or White 2.
no just one or the other
No.
Black Kyurem is in Pokemon Black 2.
giant chasm
reshiram
not at all
Yes, you catch it in the Giant Chasm.
you can catch it in giant chasm after you beat N and ghetsis.
go to the giant chasm near laconusa town and vs him
actually, you need to get zekrom to get kyurem
The Kyurem there is at level 75.
Yes, and you need to get the National Dex too.