Rollers and most turbo trainers can be adjusted to fit 26" or 700C wheels (rollers just need to be set to the length of the bike not wheel size - althought he two are of course connected). As for tryes - it must have a smooth flat section in the centre - any bumps, knobbles, grooves etc. will cause vibration and noise.
With turbo trainers a lot of heat builds up in the rear tyre and quickly ruins it (over months of use not minutes!) so use a cheap tyre. There are special tyres available with cold running rubber compounds but they cost quite a lot and are not useable on the road.
As a youngster I prefered rollers and they are more exciting and I can see why serious bikeys go for them. If you're less serious and just want to get fit though the winter I'd go for a turbo trainer. Remember, both make you sweat like you're in the Sahara so even in winter I find riding on the patio is better than in the lounge or shed.