It sounds like you probably have a bad front wheel bearing. Another possibility is that the front brake pads are worn down to the audible wear indicators.
The determination of whether the problem is brake pads or a wheel bearing is best made by inspecting the thickness of the brake pads. This is a relatively quick and easy procedure.
Front wheel bearings are relatively simple to replace. I would expect that job would cost less than $150; but I don't have recent experience with the cost of the work, and I may be way off there. It is easy enough to call around and get estimates on the phone for either of those operations
I hope this helps!!!