travel potsdam

How long does it take to travel from Berlin to Potsdam?

Also, please state the method of travel (S-bahn, car, etc.). Thank you!

That very much depends on where you are in Berlin.
Potsdam is basically a suburb of Berlin (please when in Potsdam don’t tell anybody I said this).
If you go from Berlin Main Station by S-Bahn or regional train it takes you about half an hour and should cost you not much more than 5$.