I dont think it matter no, but someone else could probably tell you for sure
yea black wheels with a silver lip looks very nice, or all black
Depends, on standard shocks you can only go as low as 35mm which is a bit lower but not slammed, 100 quid for some springs and fit them youself for free or youre looking at another 80 quid to pay someone to fit them
Cut springs will cost you nothing but will give a bouncy ride and possibly problems when it comes to MOT
If you wanna go proper low you will need new shocks/springs/panhard rod which will set you back a few hundred
theres a thread that explains it all, do a search for lowering guide