More information at zet.hr
The cost of renting a bike about 0,90 - 1,20 USD = 6 - 8 HRK per hour and 10,5 - 15 USD = 70 - 100 HRK a day.
The cost of parking is strongly dependent on the location. In cheap, not central places, the cost per hour is 0,45 USD = 3 HRK and 9 USD = 60 HRK for 24 hours.
Public transportation developed quite well even in the old town. Cost of travel 1,8 USD = 12 HRK if purchased in advance at a kiosk, or 2,3 USD = 15 HRK from the driver. All information about routes, timetables and fares can be found on the official website libertasdubrovnik.com.
Call free of charge. Boarding 4,1 USD = 27 HRK and then per a mile 1,4 USD = 9. HRK
The cheapest option - a mile walk from the old town 1,5 USD = 10 HRK per hour. In the Downtown 6 USD = 40 HRK per hour.
Trogir does not need public transport. Everything is available by foot.
Split - not a small town, but the downtown can be walked around by foot. All information about public transportation of Split here: promet-split.hr .
You'll find bike rental office inside the old city. Track bicycle rental fees:
One of the places in Split, where you can rent a bike: kaletaapartments.com
The cost of parking at a distance from the old city center 0,60 USD = 4 HRK per hour.