The stock clutch went out at 15,000 miles. And according to the dealer, it should last 50,000 miles or more. I took in into the dealer and had it replaced, and it cost $1500 dollars. The clutch is a wear and tear item, so driving habits reflect the damage to the clutch, but after having the clutch replaced, I took the old clutch to my personal mechanic to see what really happened; was it me or was there a fault with the car? Two different mechanics said it had to be some fault with the car. After already having the issue fixed, I didn't really think about trying to figure it out.
Sitting at 30,000 miles on the car, the clutch went out last night! Wow, we all knew that was coming.
I have been driving manual trans for a while, my old Mazda I put 45,000 miles on it before the clutch went out, but driving the Toyota has overall been a bad experience!
Recommendation -- don't buy a Scion tC, and if you do, make sure it's got an auto transmission.
My advice to you is to start driving cars only with automatic transmissions. A clutch even at 45,000 miles is sad. The clutch on my aunt and uncle's Protege gave in at 124,000 and my friend's 1989 F-250 still has its original clutch at 250,000 miles.
I agree - 45,000 is not that long on clutch. I don't want to sound rude, but by what your describing and experiencing, it just sounds like you're not that great at driving a manual. Try sticking to auto.