Engine does not crank?

My car has not been able to be placed in park, so my father has been using the emergency brakes and leaving it in neutral. Two weeks ago, the brakes locked up and he had to replace all the brakes. But now the car won’t crank over, and he states it’s the starter. About a week before the brakes went out, my sister's friend looked under the hood and told me my battery was leaking acid. I’ve told my father, and he told me it was fine. But do you think that could be the reason why the car is not starting?