Fuel cell vehicles won’t be for sale for several years. When they are, you will be able to choose a make and model and pay a cost comparable to a hybrid version of the same vehicle. The Department of Energy has a target price for the fuel of $3-4/gge gasoline gallon equivalent (gallon gas equivalent.) Fuel cell vehicles get at least twice as many miles to the gge as a conventional vehicle. When they are for sale, the vehicles will go at least 300 miles on a tank of fuel, just as convention vehicles do today.
For more information read the Department of Energy’s targets for fuel cells and hydrogen.