Took a private cab to Medina, Sidi Bou Said and carthage. Round trip was 40 Euros. He haggled and started his price at 80. Just walk out the port station, all the regular cabs are waiting for you. Medina markets were definately the highlight here. Not much to see other than buildings and shops in the sidi bou said.
Took hop on hop off bus. First stop was a 5 euro cab ride from port. Make sure you get on the correct bus for which loop you want to go on. Used the red buses. Sagrada Familia is a must, as is the Las Ramblas.