most are not hard to remove if your sure that is what is wrong go to any parts store and buy a new one you open hood should be able to see it if its not on top or side of will have to look under but none are really hard and you can find many car repairs how to's by typing so try how to replace alternator 1991 toyota pavia
how to replace alternator 1991 toyota
how to replace alternator 1991 toyota pavia video
and you might also find it by going to autozone.com and typing in your info they have many car repair how to's as well