It is not possible to book a transfer a few hours before arrival. Taxis are better only for trips very close to the airport. From Tivat airport to Tivat or from Podgorica airport to the city. It turns out significantly cheaper than a transfer.
Train tickets can be purchased at railway stations or, if necessary, directly from the conductor. On the Railway Transport of Montenegro website, you can find the current timetable, journey times and prices. However, the farther we go from the coast, the roads have more and more surprises.