Looking into the engine compartment from the passenger side you you will see two large bolts and a smaller bolt on the alternator. The large upper bolt is the pivot bolt, the lower bolt is the locking bolt. The third bolt is used to adjust belt tension.
1. Disconnect the negative terminal of the battery.
2. Loosen the alternator locking bolt. You may need a breaker bar to free the bolt.
3. Loosen the pivot bolt.
4. Turn the tension bolt counter clockwise to release belt tension and remove the belt.
5. Remove the electrical connector and grounding wire from the alternator. If I recall correctly this can be bit difficult. You either squeeze the connector or release a locking tab. I cannot remember exactly.
6. Remove the alternator. Be careful not to hit the radiator since you easily bend the radiator colling fins.
7. Re install by reversing the steps.
From under the car.
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It is built into the alternator. I would just replace the alternator.
No, it is a Toyota engine.
Remove the cover on the interior by prying then remove the three bolts with a 10 mm ratchet and pull it out.
Here is the link to ehow on how to remove the CV joint on a 1991 Prizm. http://www.ehow.com/how_7906772_replace-geo-metro-cv-joints.html
Passenger side floorboard under carpet.
bottom radiator hose housing