Is is possible to pay the collisions feeof $11 at the time of picking up the vehicle?

Yes you pay at the counter for it along with additional: car rental insurance, personal insurance, breakdown cover, car cover, third party insurance, tax, fees, pre-paid fuel and finally the collision fee.

Don't waste your time and money on Fox. Look at other options.

Yes, but that is per day, i hate fox, base rate is ok but they nickel and dime you. if you pay for tolls up front, its nonrefundable for what you don't use they conned me out of $112 my advice don't use them, but that's just me

Yes

I paid all applicable fees at time of pick up.