In reply to
Be wary of the el chorro recommendations. Whilst it is possible without a car, it is also quite limiting.
There a very few trains per day in/out of the village so it could take a full day to get to or from the airport. The nearest supermarket is in Alora, another poorly serviced train ride away, so potentially another climbing day lost as provision in the village are limited.
Climbing wise, some climbing can be accessed on easily on foot but because of its roadside, long established nature it tends to be showing its age.
Mid distance climbing is going to cost you a couple of routes a day in climbing time.
Having a car opens up places like valle de abdjalais for an easy day, el torcal for something different and probably most importantly desplomlandia if it gets too hot.
I cannot see that the price differential between a hire car and the rail fare is worth the inconveniences it incurs.
Kalymnos is the place to go if you want to be car free (you will end up hiring a scooter though)