Get a car or ATV to get yourself around the Island - ATVs (quadbikes) are better as you can get closer to places and get to certain parts of the island that cars can’t get to. Book ahead online for better rates, you’ll still be able to get them once you arrive but they will cost more.
Make sure you get a powerful one (450cc for a couple). A smaller 150cc quad will be cheaper but will struggle on the steeper roads.
You can only get to the Eastern and Western parts of the island on ATV as the roads aren’t good enough or cars
Buses: The buses cost 2 euro per trip and go to most of the main attractions. They are a bit confusing to navigate, each stop has a timetable but the timetable only tells you when it is leaving the first station so you have to guess (or check google maps) how long the drive would be and wait at the stop at that time.
Milos bus timetables and routes: https://milosbuses.com/timetable/?lang=en
Taxi: You can call taxis where the roads are okay, but they will cost around 17-25 euro for a 10 minute journey. https://www.milostaxis.com/
+30 2287 110 100