I should really look at the music forum more often
1. That woman is Ellen Folley, who among other things, was romantically involved with Mick Jones for over two years. If you like her, she made an album with The Clash around the time Sandinista! came out called "Spirit of St. Louis." It's only kind of a Clash album though, and I've never gave it a good listen. But I'm glad you like Hitsville U.K. I've always liked it, but that always seems to be the most hated Clash song ever. I dunno why. If you want to know more about Ellen, here's a really long biography I don't feel like reading:
http://www.users.bigpond.com/ptybisla/efbiog.html
2. I only know this because I took spanish for 9 years (and I've forgotten most of it

ride) and I'm still not sure because Strummer's Spanish wasn't very good. So this is basically a guess, but I don't think it's that inaccurate.
Spanish bombs, yo te quiero y finito
Yo te querda, oh mi corazón
means:
Spanish bombs, I want (or love) you and in the end
I will lose you (I think that's future tense?), oh my heart
3. Besides Guns of Brixton, Simonon did the lead vocals for The Crooked Beat on Sandinista! and Red Angel Dragnet on Combat Rock. The Crooked Beat isn't a bad song, but Red Angel Dragnet is such an awesome song.