KM Harris

I am new to this board. I recently purchased a used 01 Forester from one of the mega used car dealers. I am very pleased except for two noises the brakes (or wheels) make. 1. When I first start moving, there is a "squeak, squeak, squeak" that accelerates as the car speeds up and is no longer present or noticeable once I am above about 30. 2. After I have been driving 15-20 minutes, the brakes squeal fairly loudly under what I would consider normal stopping conditions. The mega used car dealer says they serviced the brakes prior to my puchase and that both noises are "normal". I am tired of going back to their service department - I would be surprised if they work on more than a handful of Subaru's in a year. Does anyone have any suggestions?