Flywheel

My car's got a problem.
When you turn the key, it makes a grinding sound. Like the starter's not really getting a good hold of the flywheel and making the engine turn. If I roll the car a little with it in gear (clutch in) then sometimes it starts. I can't really get a good look into the place I need to, but I think that I lost a lot of teeth on the flywheel and was looking for a little confirmation. Oh, and does anyone know the going rate for labor on this job. The last time I had it done (when I got the JUN installed) it was something like 500 for labor, that still about right?