If you connect your ps vita to your router wirelessly then it is free
yes
Yes because you can get free internet on a PS Vita and you can get a plan with at@t
It allows you to be able to access the internet on the go. Meaning you can playing online games while you are traveling. I suggest only get the 3g if you travel or if you are thinking of using the ps vita a lot outside of your house or places without internet.
Yes, the PS Vita's games are region free. A Japanese PS Vita will play an EU game.
Nothing is ever free.
Yes, the PS Vita's game cards are region free.
no
you cant get a free one at all
Yes, if you get the 3G version.
Yes, you can. You can access the PSN and buy not only PS Vita games, but a selection of regular PSP games that will work on it too.
the ps vita vault case
I think so because on the PS3 it is.