a/c all over again please help quick

Hey everyone once again my ac crapped out this time the clutch on the compressor seized up for good so i went to the junkyard and got a whole compressor for the price of a clutch so i figured that works out better. Now how do i get the 3 bolts out that hold in the compressor and once i do how much oil do i put in the new compressor and do i loose all my freon when i remove the compressor


thanks for your help
i just need my car my ex girlfriend is in the hospital in a coma and this is my only way to get down there.

what year is your car, i have a book, but its for the 1990, if your car is close enough it could still help

my car is a 92