It may be vapor locking or flooding. It main need some timing work.
Your car may be having problems with the fuel injector. A mechanic may need to replace it.
because your car has a gas leak
Some problems which could prevent your car from starting is, maybe you didn't put your keys in all the way. Also, you might need an oil change, or some more gas in your tank.
No
Miles divided by gallons of gas put in your car. I reset my odometer every time I fill up my car. That way, next time you would fill up your car, you take the miles that are on it and divide it by how many gallons of gas it takes to fill your car up.
Cars will use more gas idling than starting the car.
Yes
Get out and look
No it cann't unless the hole is bloked.
No
You fill the car with gas, you use up all the gas, then you fill it up again!
SHELL Gas Station