But don't get your hopes up. Not all glass is the same. I've tried it on other vehicles with little results. My dad just bought a used Honda Civic and the previous owner had used steel wool or something on the glass. It was covered in little scratches. I buffed it with the most agressive stuff I had and it didn't help at all hardly. Maybe Toyota's have softer glass.
Anyways, let us know if you're able to remove the scratches.
Anyother thing to remember is, if you live near a beach or sandy area, be careful when you roll down your windows. It can scratch your glass if you lower the windows while a piece of sand is caught between the glass and the lower seal.