I wouldn't worry about the wine and tapas portion. Things are really inexpensive her, and the tapas has been universally good. It's easy to get three or four tapas to share and a couple of glasses of wine for 15 Euro.
As for the tours, we didn't take any, but I think for one day in Cordoba it would be a good idea because I think that day may feel really busy. For Sevilla, I have a mixed opinion, I really love to wonder around, get lost and then navigate my way out...but thats just me. On the other hand the streets are very narrow and very labyrinthian (is that a word?). We've been out walking about 10 miles a day and there is something new around every corner.
I think you'll love the off season. Spanish is virtually the only language we've heard either in Sevilla or Cordoba