The Vita is region locked, so as long as you intend to keep importing games from Japan, then you can use it in the UK.
There's no such thing as an Indian PS Vita game. Any PS Vita game found in India will be a US or EU version, and both will work fine on a US PS Vita as the games are not region locked.
Most consoles are locked into different regions and an American console would not work on a Japanese console. However, an oversight from Nintendo allows an American gameboy to work with Japanese games. Yes.
Yes. The PlayStation Vita is not a region-locked system. However, to play a digital copy of a game bought in a different region, you have to be signed in on a PlayStation Network account from that region.
Yes, It is not region locked
The region is locked on the Xbox, not game.
A one code DVD is region locked and cannot be played outside of whatever region it has been locked in. A multi region DVD is not region locked and can be used anywhere.
Yes, the PS Vita's game cards are region free.
Yes, the PS Vita's games are region free. A Japanese PS Vita will play an EU game.
The PSP is region locked only for UMD movies being played on the machine. all games are region free and will work from anywhere in the world
Yes
Yes.