We live in Gib but rent a holiday place in Spain as well. In our rental agreement the landlord pays the basura (rubbish collection) tax and the urbanisation or council tax, and we just pay for any gas, water, phone/internet and the electric. As we rent a villa we also pay to maintain the garden and the pool, but if you are going to rent an apartment or town house on a complex this will probably be included. You can negotiate all this with your landlord/agent and have it set out in your lease.