Based on my experience I would project about 2 uses of the fabric guard. I used more then half of it the first time. Probably because I put it on heavier then I needed to.

Yes you can store it BUT notice the warning on temp that is on the back of the box. Since I live in an area with very cold winters I store mine in the house. Even though I have a heated garage, I do not keep the heat above 55 in the garage that it calls for on the box unless I am doing some work out there.

I used considerably less cleaner. This was due to the condition of the top being good and clean. I would project maybe 4 applications per bottle for this. I guess it depends how the car is used and where it is stored.