Believe me, you can’t risk asking anything even 10% close to these questions unless you want to scare him away :). Unfortunately people claim to be very "open minded"and wanting to marry someone with good exposure BUT they can’t take an open mind especially if you are a girl :). SO unless you see alot of issues in this particular rishta, you shouldnt mess it up.
It’s not that hard to check up on the prospect and his family, infact you can get to know alot about him without having to ask him. Just find the right reliable people to do the work for you.