That'll depend on what model it is, what optional accessories it has, how many miles it has, and what sort of overall condition it's in.
Freightliner dealership.
Somewhere in the vicinity of 16,000 - 17,000
You need it appraised by a dealer.
Depends on features, mileage, and overall condition.
Depends on miles, optional features, mileage, and overall condition.
Depends on model, features, mileage/hours, etc.
In order to find instructions on how to read the fault codes of a 2000 Freightliner FLD 112 with a C12 engine you should go to heavydutypowertrain.com where they have an extensive selection of instructional material including how-to videos.
lol $5 It all depends on what is left of it that can be used.
Depends on model, features, mileage/hours, overall condition, etc.
Need to know mileage, condition, drivetrain, and available options in order to answer this.
Without knowing what type of engine you have, there's no way to tell you the torque specifications for the valve cover bolts, and that's pretty important. IIn 2000, several models of Detroit Diesel, Cummins, and Caterpillar engines were available for the Freightliner trucks.
Try replacing the speedometer switch on the transmission.. that's probably your culprit.