bigash

I have a 1999 lexus rx300, almost 150,000. There is a loud booming, creaking noise anytime I apply the brakes. Brakes are ok , but that noise. Also loud engine noise. I bought this car over a year ago and used it mainly during the winter. At this point what are the maintenance on this car apart from the usual oil and filter change. It runs good and I love it and really want to maintain as long as it has power. Also what about timing belt. I didn't have any history on the car, all efforts have failed. I recently realised water at driver side which I read about how to repair. My beef now is the braking and engine noise and also kinda of clatter sound from driver side front tyre shocks. help. overall it runs very very good