No
No
Yes, it will. I have a 94 integra ls and i have two 12's in the trunk.
No 94-2001 are a different body style and will not fit.
No integra has wider angle
No.
Yes, but you'll need to change the headlights to 1998-2001 models.
No, 90-93 was cable operated, 94-up was hydraulic.
No, the brake booster on a 1994 Acura Integra is different from a 1992 model. The 1994 model is a different generation and uses a different sized brake booster.
Yes they will fit however you need a 98 or newer front bumper for that to work which then would include new turn signals, if I recall correctly you may need to remove the ABS if the car your working on is a 94 or 95 since they had larger ABS modules.
The lug nut pattern is the same - 100mm x 4.
Places like the Ground Control website don't list their coilovers for 91-93 Integras and 94-01 Integra being compatible. They may work, but I won't gaurantee it. So short answer no, but the long answer is that yes you can if you mix and match components off of a 92-95 Civic (uses similar parts as the 94-01 Integra, and they are more common in junk yards) with your car. It depends how much you want the 94-01 Integra coilovers. Check someplace like hondatech.com for more help.