If you just go to the taxi rank in Malaga airport a normal taxi will take you for about 160 - 190 euros.
It is wise to agree the price before you set off.
A less stressful but alternative is to book a taxi in advance.
There will be someone holding up a sign when you get of the plane, and they will take you to your destination.
Granadainfo offer a fixed price of 130 and will book a regular taxi and make all arrangements for you.
https://granadainfo.com/organise_taxi.htm