Do I have to have a drivers permit to take the driven test ?

Not if you're 18 or older and you have passed the written test. But you have to go to the office to schedule the test.

I went to Ross on Maryland park way

No, you're going to do the test to get your license!

Probably not, unless you are 15-16yo, but if you're 18+ I'd strongly suspect that you are not required to have it