Answer 1: Taxi Bus Nerja takes 65 euro and has a very good service.
Answer 2: Malaga shuttle bus takes 20 euro per person. Note that you must book in advance.
Answer 3: 65 euro if you book with a taxi company in Nerja. Valid for up to four persons.
Answer 4: The price varies depending on if it is weekday or weekend. During the day it is between 65 and 80 euro. After midnight, it is 110 euro.
Answer 5: 70 euro if you order it from Nerja. More expensive at the airport.
Answers translated and refined from Nerja friends Scandinavia