Hi, the price for a taxi from Malaga airport is 15€ aproximately; some taxi drivers may try to get more money for the trip (one tried with me when coming to the airport from La Carihuela overcharning 2€, and there is a plus when taking a taxi at Malaga airport or train station).
There are other three options:
- The train from Malaga airport to Torremolinos is aproximately 2€ or 3€ (I don´t know exactly), but the train stops in Torremolinos center so you will have to walk about 15 or 20 minutes. If you let me know where exactly are you going in La Carihuela I can tell you better as I live there.
- Another option you don´t contemplate is to rent a car in Malaga. Prices are cheap and if you plan to tour the city you can save money
Hope to be of help