How much will it cost to repair a clicking sound on a car that's sat idle for about 3 years?

What is your question?

A few years ago my car started making a clicking that correlated with the tachometer. We took it home and haven't started it more than a few times since. I need to repair it and wonder roughly what it will cost. It may also need a fuse replaced in the passenger compartment, but the clicking is the biggest concern.