How much does the fuel cost to get to the moon?

The space shuttle's external fuel tank caries 146,182 US gallons of liquid oxygen and 395,582 US gallons of liquid hydrogen to fuel the orbiter's main engines. Each of the 2 Solid Rocket Boosters each contains 1,100,000 pounds of propellent consisting of ammonium percholate, iron oxide, and aluminum.

However, the space shuttle can only reach low earth orbit.

The space shuttle doesn't have nearly enough fuel to get all the way to the moon.

The only launch vehicle ever to carry humans beyond low earth orbit was the Saturn V.

It had a total launch weight of 6,699,000 pounds (3,039,000 kg).

Nearly all that weight was fuel, roughly 9/10 of the launch weight.