Well not sure about the jetta, but the bolt pattern you should be looking for is 5x114. Offsets then should be your next issue. But it can be manipulated with spacers.
yes!
yes
yes it can.
Yes
1985 - 1988 Nissan Maxima is the only other Nissan model with power window motors that will fit a 1986 300ZX.
Will rims from an 09 Toyota camery fit an 05 jetta
yes with heavy modification
Yes.
Unfortunately they will not fit on your Jetta. The bolt pattern on the BMW E46 wheels is 5x120, while the bolt pattern on the 2014 VW Jetta is 5x112
It should.
There is a chance :) If the vauxhall wheels are 4 x 100 and if the main hole is big enough to fit nissan's, yes, there is a chance :)
Yes