Dian
All across Spain
Did you click on the tab on the top right hand side of the page I gave the link to “internet & communication”?
Electricity charges I think you will find they are similar to the UK but will depend upon what type of heating / AC / pool etc. you have. I would budget around 100 – 150€ per month inclusive of all charges
As for mobile phone it is again no different to UK there are many providers Yiogo. Mas movil, Movistar, Vodafone, Orange, Carrefour, Telefonica etc. etc.
All do PAYG and contracts (you will not get “free phones” but sim free phones similar price to UK), you can of course bring your UK mobile and as long as it is unlocked just swap out the SIM card. They all offer packages for talk, text, broadband
Many packages available with satellite TV / broadband / dongles / home phone etc. (check out the local English press as many advertise)
Only advice is to shop around you will of course need ID and address (NIE and / or passport) etc. to get a mobile phone either PAYG or contract
My advice would be start with PAYG SIM (esily toped up at many shops) get your UK phone unlocked and see how you go