Once you have used the 28 tram it is better ,quicker and cheaper to use the bus,buy a top up card to make on and off easier. Use the metro, 734,721 and 735 buses. 721 leaves along the street and 735 up an easier hill than the 734 although it is the best.
Local restaurants much better value than those in town and cheaper.
Great city and lovely people excellent choice for a city break in Europes best city.