DA*fruitcage*IT -- stupid computer. Here goes again.
I don't have the gun, haven't handled it, but I think I can answer some of your questions.
1) The bolt catch appears to do nothing
2) While it's mostly for show, I'm assuming it actually works
3) There's a little hex screw on the right side, so I'm guardedly optimistic
4) Yup: there's a big finger knob on the right side, no reason for Marui not to replicate
56) I see no reason why Marui would have changed any of that... probably same material and color as the G36
7) While the markings are not present on the MP7, they