I just use old tires I have laying around. I've never worn out a used tire on the trainer and can't imagine riding enough indoors to worry about buying specialized tires. Since Oct I've done more trainer rides than any other season and I'm still only up to 20 hrs. Usually 1 to 1 1/2 hrs at a time is about all I can handle.

I use 3 turns and 110(ish)psi. I usually just do tempo intervals from 260-280W so I don't encounter much slippage.