Athens has yellow taxis, you can hail them on the road or you can use and taxi application called FREE NOW which works similar to Uber. Taxis reasonably inexpensive for inner-city traveling.
Radio Taxi Call Center Glyfada: +302109605600
The closest metro station is Elliniko which is a 15-minute taxi journey. It is the best way to get into the center of Athens, and once in the center, it is the best way to travel around. You can buy tickets at the metro station.