The minimum fund requirements for an entry to Spain currently stand at €64.14 [~￡60] per day per person, and in all cases a total minimum of €577.26 [~￡600] per person.
If it is just a touristic visit,then I don't think you need much of a balance,you should check witht he Spanish Embassy in the UK.
Not enough info given. Do you mean how much travel money do you need? That depends. Do you wanna stay in a five star hotel or the Ritz? What do you plan to see/do? No one can answer this at all.