I highly doubt you need an entire exhaust system because of some noise. So scratch that one off. Probably don't need a front wheel bearing. These are sealed, and its pretty uncommon for them to go out, but its possible. I'm assuming the noise could be caused by bad brakes. Are your shocks really THAT bad? You probably can live with them if you dont want to spend $$ on it. How are the tires? How bad is the cupping? Cupping can be caused by a bad alignment or improper tire pressure and not shocks like they say.
Also the last comment says a leaky wheel cylinder. I'll bet you $500 its the axle seal and not the wheel cylinder.
Sounds to me like you only really need an alignment and new front brake pads which should cost $200 total at most. An axle seal is not needed but should be replaced. The part is $10 and the job should only take a mechanic 1hr.