Have a few questions with JVC KW-AVX820
would I need any other adaptor to hook up bluetooth and ipod?
Can I also hook up TV signals? How, with what adaptor?
Bypass viewing video when in motion is as simple as not hooking up the parking brake plug?

 

Crutchfield usually has good detailed info, check out the tabs for that model on the product page. Also, try JVC site for the Users Manual. Been pretty happy with my JVC A805, but its not a full display deck.