A:AnswerI don't completly follow your question. However, I can say that I have a working backup cam (My car did not have one built in) with this radio. However most backup cameras have a standardized adapter, so a stock (factory installed) backup camera should in theory connect to this without issue.
A:AnswerThe Balena isn't sold in the US AFAIK, so I can't verify, but...maybe. From the photos it looks like a 2 DIN stereo might fit.
Your best bet is to search Best Buy and see if there's a dash kit available for your car. If there is, you're in luck. It's a nice head unit.
There's a backup camera, but it's sold separately.