Ravenna is a city in the Romagna zone of Emilia-Romagna.
Walk. The old town is a mainly pedestrian area with cafes and bars on every corner and some hidden away through small access alleys. Note that everything is a little more expensive near the Basilica.
Mi Muovo is an integrated public transport pass for the region. Short-stay visitors might use "Mi Muovo Multibus", a 12-trip bus ticket, see Emilia Romagna#Get around.