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Brake lifespan will depend on the driving conditions that the vehicle has seen. Good example is my own Corolla - its front pads were close to being gone by 25K-30K miles, in comparision, my Matrix probably got close to 90K miles on the front OEM pads. Both were were mainly highway miles, but the Corolla took the brunt of traffic conditions, the Matrix was more for long distance road trips.
You could always take the wheels off and inspect how much pad thickness you have left. IMO, once you hit the pad squealers (metal tab indicating low pad thickness), you've probably gone too far. By replacing my front brake pads before they hit the squealers, I haven't had to turn down any rotors (cut them). The OEM spec'd rotors are fairly thin anyway - only have about 1mm allowable wear on each side before the rotor drop out of minimum useable thickness.
Might be able to get just a light "polishing" of the rotor before you replace the pads. Usually a good idea to rough up the surface just a little bit to speed up the bedding in process of the new pads. Composite pad materials now don't need as specific bedding in process like in years past - but still a good idea to go easy on the brake as you get some heat/wear into them.
The Toyota OEM brakes on the car are a ceramic composite - they tend to last a little bit longer than the old organic types with better noise control and low dusting characterists. That said - 60K miles in mixed driving is pretty far - be a good idea to eyeball the thickness youself and decide how you want to procede. Replacing the the front pads are quite simple, once you see the steps involved. If you want to DIY - could save a considerable amount of labor costs.
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2002 Corolla S, 1.8L 1ZZ-FE VVT-i
2003 Matrix XRS, 1.8L 2ZZ-GE, VVTL-i (RIP)
2009 Matrix XRS, 2.4L 2AZ-FE VVT-i
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