I just wipe the door sill with a damp cloth and a few drops of dish soap. That usually takes any marks off with just a little rubbing. If that fails, put a small dab of car wax on a clean cloth and rub the mark. The car wax often will take off marks that dish soap won't.
As to the radio, put the TCH in neutral and hit the power button. That leaves the radio going and kills the ICE/HSD system. Also useful if your on the phone with bluetooth and don't want to get disconnected.
Put it in Park and hit the power button twice to shut down the car.
I just replaced my OEM Bridgestones with Falken ZE329
tires. They are low rolling resistance, and ride better, and are quieter than the OEM tires. So far my mpg hasn't changed. I've put ~600 miles on this tank and am showing 44.5mpg since getting the tires. It's been hot (in the 90s) and I've been running the AC some in the afternoon. The last tank on the old tires was 45mpg.
There is a good thread on replacement tires for the TCH called Quietest LRR tire for TCH