So far only sndr has given the correct answer: it is UAZ 3160.
dani_d_mas was also pretty close on #4, so I'll count his answer: it's a Laura Mk III, based on Pontiac Fiero. I reminded about it when we talked on another tread about huge Russian Hummer-alike a month ago. This one is from the same manufacturer, but can be ordered with any other chassis/engine of a choice. Oops, sorry, sndr, you get 2 points, not 1
So we are left with #1 and #3.... #3 is really tough one, let me know when you give up
