1994 Legacy wagon has been told it needs brakes but no symptoms.Now right...

What is your question?

...after having new tires put on--suddenly there are major symptoms.Terrible squeaking noise when braking--squeaking with a "crunch" sound--and now similar sound when turning corners. It does this all the time now since new tires. Estimate is $900 for brakes alone. But are there times that cars do this after new tires when they don't need them? Last trip to mechanic for something else--was told "sometime you'll need new brakes..." Did the new tires create the "sometime"? Is this a stupid question?!