For car hire, compare the collection and return locations, mileage allowance, deposit and cover for the route you plan. A cross-border leg needs the rental company’s permission. A rental agreement also leaves mountain-road conditions as a separate decision.
With a driver, the stops and waiting time shape the transport proposal. A direct transfer and a day spent visiting places are different requests. Name the visits that matter and the overnight addresses; that gives the regional-trip enquiry something concrete to work from.
Prepare a car-hire request with the route and dates, then compare offers from the responsible rental providers. For a transfer request, include the sightseeing stops and the time you want at each, so it describes a touring day as well as the journey.