At every other oil change.
Rotate your tires regularly every 5,000 miles for the best wear. Rotate at the very least every 10,000 miles.
Yes
At the dealer I work at in central Illinois, we charge $14.00 for a four tire rotation.
Tire rotation for the Toyota Solara is every 5000 miles (per the owners manual). That just happens to coincide with the oil change schedule and also the mileage at which many tire vendors will rotate (and check balance) of your tires for free. Every 5000 miles is also the inspection schedule for brake lining/drums, pads/disks.
Auto tire rotation often comes at the grand price of free. If you return to the location where the tires were purchased they will, quite often rotate them for free.
If you were rear ended while you were stopped with your foot on the brake there would likely not be a 360 rotation of your vehicle tires.
Your tires would definitely have to rotate if you are speeding !
In my area it costs $20-$32 to rotate and balance the tires.
Rotate tires 2 front 225 and 2 back 245
If the vehicle is a rear-wheel drive, the tires should be able to rotate when not in contact with the ground - unless the brake is set to stop the rotation. If it is a front-wheel drive, the tires should not rotate unless the vehicle is in neutral - likewise if 4-wheel drive is engaged.
Sure, you can balance the tires. Any place that sells tires can balance your tires. You cannot rotate the tires as you have already stated they are not the same size. Balance but do not rotate.
On average you should rotate your tires every 6000 mile or 6 months.