Okay, a quick reply before I knock off for the day! In both cases, after you go round Malaga and past the airport, 15 minutes later you will come to Fuengirola where you choose the toll road or coast. Don't take the toll road, now I know where you're heading. Devon, Barratt's Doña Lola Club is actually in Mijas Costa, not Marbella and you are 10 minutes from Fuengirola and about a 20 minutes drive from Marbella town. When you get there, say hello to the receptionist called Pepe and tell him Irene's (pronounce it ee-ray-nay) cuñado (brother in law) sends his regards to him! I have lived here for 15 years and haven't been on a day trip to Morocco yet, but search the board for info and thoughts on it.
Betharita, you are about ten minutes drive from Marbella town, near to where I normally go to the beach on a weekend. A day trip is just about possible to Sevilla, as it would take about two and three quarter hours driving and leaving early this would give you time to get a taste of my favourite city (I, me, my ... yak, yak, yak!!).
However, if you have a chance to take a leisurely ride back to Madrid, I would spend a night in Sevilla and travel on to Cordoba and have a night there and then back to the capital, having a late lunch in the square at Chinchon, this time, on the way to Madrid. There are some great trips you can make from your bases, but I'm knackered now and have to go home, so they will have to wait!