Posted: Tue May 22, 2018 8:58pm
Others will hopefully give you better advice, not least because I can't answer number 1.
But for number 2 if you are buying a property then your lawyer will be able to do obtain your NIEs for you. Ours did and she had power of attorney so also opened bank accounts, got the utilities transferred into our names and connected. You can do it yourself of course, probably quicker and certainly cheaper but this will probably need a reasonable command of Spanish. A gestor would also be able to arrange it. It can also be done before you arrive via the Spanish Embassy in London. I went for the easy option and left it to our (very hapsolutely fabilous) lawyer.
For number 3, personally I would (and did) bring a laptop and/or tablet from the UK. Locally the range seems much more limited and more expensive than buying from a computer shop or Amazon in the UK. Although saying that amazon.es will deliver (https://www.amazon.es/?tag=cstareg0f-21).
Rob
Los Gallardos/Palomares