The leak may be allowing air into the system which will render the system inoperable. Fill the system and fine the leak and fix it. After you fix it turn the wheel all the way to the left and fill the reservoir then turn it all the way to the right and and back to the left about 10 times checking the fluid level each time and filling up as needed. After doing this start the Jeep and see if you have power steering again. It is very rare that a gear box will need refurbished unless it leaks any play can normally be removed, so if you still have no power steering more than likely your pump has been damaged due to a lack of fluid.
This is my Jeep. There are many like it, but this one is mine.
My Jeep is my best friend. It is my life. I must master it as I must master my life.