Jadrolinija app, it can be set to English for ferry routes, schedules and purchasing tickets and online at https://www.jadrolinija.hr/en
If you’re interested in taking the train take time to look online at https://www.traincroatia.com/en/. Note that the train sometimes does not take you all the way to your location, but to the closet train station to your destination and then you will need to take a bus, taxi or uber.
Car rental
Consider if you really need a car: Split is a walkable city with great public transportation, so a car might not be necessary. If you plan on exploring the Croatian countryside or nearby towns, then a car becomes more helpful, but buses and trains connect to the country quite well.
Insurance: Rental car insurance can be expensive, so check your existing car insurance and credit card coverage to see if they provide rental car protection in Croatia.
Tolls:https://www.hac.hr/en/toll/toll-rates/a1. From Split to your destination, it will vary in cost. If you take the bus you do not have to pay the toll. It is in included in your ticket cost.
Parking
Driving in Split: Driving in Split can be challenging. There are congested roads and limited parking. The road are narrow and people like to drive fast. Familiarize yourself with traffic regulations before hitting the road. Keep your eyes wide open as there are lots of jaywalkers. As pedestrians should have the right of way, that does not seem to be the case here. Always look both ways before crossing the road even if you have the right of way. Always make sure to close your side-view mirror if parking on the street. Sometimes the cars just sweep by so fast and will take it right off.
Parking: It is not easy to find parking. If you see a spot marked in blue, you have to pay to park there. On roads and in car parks, parking places reserved for vehicles of persons with disabilities are marked with a wheelchair symbol and marked in yellow.