Gasoline is required to drive any non-electric car.
179/6.04 = 29.63 mpg
It will depend on the car, the current price of gasoline and quality of gasoline used, the pressure in your car tyres, and the direction and speed of wind.
Estimate 30 mpg
Approximately 444 miles.
That would depend on the price of the fuel
gasoline is a fuel. It produces energy when the fuel is burned. In your car the spark makes tiny explosions which drive engine pistons up and down, thus moving your car.
I wouldn't even drive it another foot, if I could avoid it. Get it to a mechanic. It's clear that gasoline is leaking somewhere.
You need the exact same license to drive an electric vehicle as you do to drive a gasoline vehicle on a public roadway.
None, if you drive a diesel car! The answer will depend on the type of fuel as well as the fuel efficiency of the vehicle.
If you fill a gasoline engine with diesel, you will normally be able to start the car and drive a few miles, but after a short amount of time the car will die out. There will likely be no permanent damage to the car. If it was gasoline in a diesel motor, it would be much worse.
Your best bet would be to buy a gasoline-electric hybrid car, which, as it sounds, runs on batteries as well as gasoline. With a hybrid car, you won't have to compromise the amount of miles you can drive for the little-to-no emmissions you get from an electric car.