Agreed with Colin for metro... 10 minutes walk from there but instead of walking road side, go through the Mosque grounds... Much nicer, quieter and safer !

You don't need a ticket. The lower level has a restaurant and I think a small hotel. So all you have to do is wander around. We did not find it that interesting but don't take our word for it and have a look around. It will not take that long!! We did not explore the upper levels because we reached the same conclusion as LorraineP did that there were just offices.