What is required to get to the alternator on a 1999 ford taurus se 6-cyl and how hard is it to change out? Approx time to complete for a beginner?

This is what is required to do the job....and it would take you no longer than 1 hour for the beginner...

3.0L (VIN S) Engine

1. Disconnect the negative battery cable.
   
2. Remove the accessory drive belt.
   
3. Disengage the electrical harness connector and output terminal wiring.
   
4. Remove the engine control sensor nut and position the nut aside.
   
5. Unfasten the two alternator bolts and one alternator stud bolt.
   
6. Remove the alternator from the vehicle.
   

To install:

1. Place the alternator into position and install the two mounting bolts and bolt stud. Tighten the bolts and stud bolt to 15-22 ft. lbs. (20-30 Nm).
   
2. Place the engine control sensor in position and install its retaining nut. Tighten the nut to 11-14 ft. lbs. (15-20 Nm).
   
3. Attach the electrical harness connector and output terminal wiring. Tighten the output wiring terminal retaining nut to 80-106 inch lbs. (9-12 Nm).
   
4. Install the accessory drive belt.
   
5. Connect the negative battery cable
   

Very easy, the hardest part is getting the serpentine belt off due to lack of room. make sure you disconnect the battery first, the alt sits right on top