Hi there,
From memory its about 25/27 Euro from Tenerife South Airport (from the North it will be considerably more).
There are a couple of companies where you can arrange pickups as well, one is orangebus.eu - you can check the price online. If I can think of any others I will add to this message.
Hope you enjoy your stay.
There is a lovely restaurant close by called Restaurante Margarita, good food and entertainment. Also a good Irish Bar, Irish Times, just reopening under new Management that should be bouncing this week if you like that kind of thing

Cheers
sgd