Dont waste your time turning the rotors. Once the rotors have been warped, they develop hot spots due to the extreme heat. The metallurgical changes that the rotors undergo during and after warping cannot be fixed by turning. You can turn the rotors over and over, but each time they are heated, their resistance to warping is diminished substantially. For example, once you bend a steel plate and straighten it out, the resistance to bending again is much less than before, in essence the metal becomes soft.

I would sincerely tell the dealer that unless they want you back every other day, just replace the rotors with new ones. If you are under warranty, tell them you will call the regional distributor or Toyota directly and complain. They will cave in. If not, then buy the rotors at autozone.

You probably know this, but breaking the rotors in is extremely important if you do not want them warped again. For the first 1000 miles, try to stop without trailing or Riding the brakes. Instead try to brake with steady but firm preassure on the pedal without "panic" braking. With new brakes (rotors and pads) you want "break in " the brakes by generating enough heat so that the pad material coats and transfers to the rotor, but not too hot where there is no transfer. I am not a mechanic, but have many friends who are mechanics at different dealerships and they allhave told me the same regarding brakes.
My 2 cents.!