1995 pontiac bonneville A/C compressor

the o-rings are metal gaskets with rubber inset that go around the a/c line.

Most cars have an option to buy a belt for a car with or without Air Conditioning. I would check first if your car offers that option (then if you don't need AC you can just buy the other belt and not have to fix the compressor). If you need AC you will have to buy a new compressor (local junkyard is your cheapest bet). I would have a mechanic install either the new belt (to make sure no other pulleys were bent when the belt snapped) or the compressor (some AC lines can be difficult or dangerous to repair or replace). Good Luck!

No, A/C replacement is complicated, there are legal issues with the release of the R132. There are oiling issued to be addressed, and a receiver / dryer that needs to be changed. Take to a qualified shop for this job.
it is VERY easy to get injured working with A/C systems.

One of your fans works off the coolant temperature sensors input and will only engage when the coolant temperature reaches and/or exceeds a certain preset degree. The other runs off of your a/c compressor and when it engages so will the auxiliary or secondary cooling fan. Start the engine cold, turn on the a/c and listen for the secondary fan to engage then as it warms up listen to see if the primary fan engages. when it reaches running temperature. Please rate me on this answer.

can you drive your 1994 buick regal without the a/c compressor on your main drive belt. if so how?

try a throttle position sensor

Find ac preasure switch and install jumper,if compressor comes on it will be either low on refrigerant or faulty preasure switch.

all "gears" in your transmission depend upon hydraulic pressure to keep them engaged. if od clutch is worn or burned, or pressure is escaping at an internal seal it can cause the problem you have. Always be sure that fluid is full and is not burned. If it seems OK, have the unit checked by a reliable shop...there is nothing "user friendly" except perhaps a fluid and filter change that can be done on your transmission.

pontiacs have a security key do you have another key you can try to make sure this is not the problem ?

95 bonny--1-turn ign switch off 2-using a fused jumper wire jumper data link connector #8 blk/wht wire to #4 blk wire (look under dash for dlc)
3-press unlock button on 1 transmitter doors should lock and unlock
4-repeat step 3 if doing more than 1 remote
5-remove fused jumper

for the 1993 car same way except jumper term a blk/wht
term g ppl/wht
have fun