caveat, if i remember rightly the journey from almeria- mojacar took 50min-1hr.
we hired a car, even if you dont use the car in mojacar at all it still may be better to hire a small car for the week rather than pay a return taxi fare. almeria airport is small and easy to get in and out of,we got the agent from the villa letting co. to meet us at a filling station on the roundabout as you drop down into mojacar playa. car was handy for a trip to garrucha (along the coast)and a day at the aquapark