The above pic is describing the system how the car will be lifted if car is placed on the larger piston. But if the small piston is moved through 1m (say) ,then the piston is merely moved by millimetres. Then how, in practical life,small piston can actually be used to lift a car in a carwash station. If helpful, please suggest books, E-books or a few good articles.
The following portion is edited area after the question was declared answered
My question was very nicely answered and now my confusions have been eradicated and I'm grateful for that. I have hit upon a conclusion in the light of answer given and want the experts to confirm my following statement: If small multiple displacements "h" are not considered(see the answer with figure) and only stroke of the smaller piston is considered,
THEN more fluid enters the large piston than fluid lost by by smaller piston and vice versa (on pushing small piston) i.e more fluid will come out of the larger piston than fluid gained by smaller piston upon pulling the smaller piston upwards.
Note: I also wrote similar text in comments section but now I edited question thinking I followed wrong approach