1. yes, a mini one, not full. has the main - audio, setup, chapters, playlist.
2. if u buy locally, it is std version; import from or buy in china, i dunno.

3. if u do not need help with such a box, u can buy online, from shops, from sellers in garage section.
if u need help for firmwares, apps, networking, formatting >2TB internal HDD etc., better buy from a known helpful seller.
u can pm and ask some of the users if u can't find a name.

check the firmware. if it is 1.0.x, it's a bit out of date, android5.
2.0.1 is android7; there is 2.0.3 but i m not using it.

i do not know what u expect as "bluray menu".
it is certainly not like a bluray disc where u see a full blown menu popping up.
the mini menu is just one line on the screen, brought up by pressing a button on the remote.