Moving to Spain consists of two parts: The first month and everything thereafter.
So..... Hostals and other cheap accomodation.
Where to find the permanent accomodation, Loquo, Idealista, Sublet.com etc
How to get about. Metro maps, Street map. Cheapest way to travel.
Good places to eat - Cheap places to eat - including info for Vegetarians. Spain is not vegetarian friendly.
Phones, bank accounts, other official paperwork.
Just off the top of my head.