Disconnect your ground cable from the battery,get under the car, remove the wires from the starter and remove the two bolts holding it in. One bolt can be accessed from the top and screws into the engine. It's much easier to reach if you remove the air cleaner and air cleaner tubing. The other must be reached from under the car and bolts into the transmission. You will need about two feet of extensions.
You need a new starter
How do you replace the timing belt on a 1994 Geo Prizm 1.6?
See the related question: How do I replace the water pump on a 1993 Geo Prizm 1.8L?
Look here: How do you change the starter on a 1996 Toyota Corolla?Prizm and Corolla engines are the same.
From under the car.
The signal for the starter originates from the key switch, I would start there.
1995 geo trunk lid bulb
You may find some help by searching for this question.How do i replace the water pump on a 1993 Geo Prizm 1.8L?
Remove the old mount & replace with the new.
If you are referring to the water inlet hose on the back of the water pump you can use this question as reference. How do i replace the water pump on a 1993 Geo Prizm 1.8L?
You don't fix it, you replace it.
Geo Prizm was created in 1989.