The colour temperature came out fine, but... well... to be blunt, I'm not sure much else did. All of the images are soft, and as mentioned the background is horribly distracting; vertical and diagonal compositional elements (the stairs & lattice) grab the eye and pull it away from the subject.
In the first two, you've got her square to the camera (football) shoulders) with the standard "Squirrel????" look of someone who doesn't know how to pose (That's normal, most people don't) and hasn't been told (That's NOT normal, that's YOUR job). Women are almost always better posed in part profile; anwything from a full 3/4 profile to just off straight, but never the dreaded square to the camera, arms at her sides! Notice how much better #4 looks because she's turned slightly toward him and while I'm sure it was accidental, you've got him in a good masculine pose too.
Your settings are ALL over the place; a shutter speed of 1/20??? That explains why #4 is soft. It's critical that you ensure that the camera is doing what you what it to and not what it wants to (unless they're the same thing).
Now that you feel you've been flayed alive, given the conditions, they're not actually that bad. Yes, there are LOTS of things that could be improved, but these are definitely nice keep-sake images. You can do a lot to improve them as-is too; adding a nice gaussian blur to the background would help, and these would be quite easy to cut the people out and composite on to another background as well. One thing I would do is some skin smoothing; while an attractive young lady she suffers from the standard adolescent acne bumps, and I'm sure she would prefer not to be reminded of that...
Just my $00.02 worth - your mileage may vary.
~John