No, unfortunately.
Yes and now you can get pokemon card games from different regions too!)
there are no other regions in Pokemon black or white.
The Unova Region. It is very, very far Region.
NO
You cannot go to different regions in Pokémon White.
This has been answered many times before. Anyway... Pokemon are different (e.g. main legendary), places are different (e.g. Black City / White Forest), and there are different battles.
The difference is is one game you get different Pokemon like in white you get thunderous in black you get tornadus or in white you get zekrom and in black you get terrakkan.It is just different Pokemon you can or can't catch.
Actually there are five regions the fifth is Isshu from the new Pokemon games Black and White.
Pokemon White is the latest installment in the Pokemon franchise. It was released simultaneously with Pokemon Black, a game quite similar to White, but with a few different Pokemon. White and Black were released exclusively for the Nintendo DS.
Yes, they are different, but not VERY different.
The experience is different
White Forrest has a very limited selection of Pokemon from past regions. It is advised that you get the Pokemon via Poke Transfer.