Beginner's Routine--how does it look?

Howdy. I'm 16, 165lb, 5'9", and I don't know my BF, but I would guess b/w 12-15, b/c i have some abs. I'm primarily a runner but I want to build up my upper body too. I don't want to be huge, but I want to have a decent amount of muscle and some abs. I thought I would bulk up for 2 or 3 months, and then start to cut/tone. I spent the past 2 months woefully clueless in the gym, and as a result i seriously overdid it. after some time off, I came back to it 2 weeks ago after reading up (I recommend www.exrx.net !!) and fixing my routine. I've seen pretty good gains so far; I'm wondering if you guys had any advice/comments.

As I said, I'm trying to bulk right now, so for pretty much everything I'm doing 1-3 sets, trying to get between 8-12 reps, and increasing weight whenever i can. My school has gym on everyday but wednesday (4 days a week) so I thought a push/pull split works best for me (though I've switched hams with quads). Its basically this:


Monday/Thursday Push


Flat Bench
Ham Curl
Incline Bench
Straight leg Deadlift
Front Shoulders---raises or presses
Calves push up w/ weight
Tri pull down
Obliques

Tuesday/Friday: Pull
   

Lat Pull down
Squat
1arm row or Bent over row
Leg Extension
Side Shoulders--usually lat raises
Bicurl
Upright row, or straight arm push down for traps
Abs


Since I'm also a runner, and I want to keep off the extra fat, I like to run on the treadmill after each workout (30 min, 4 miles), but recently I've discovered that doesn't work out so well with squatting, because my legs are pretty shot. Do you think I should do all legs on one day, and then run after the workout on the other? Or coudl I just run in the morning of squatting day? I love to run, and I don't mind eating the extra food.

Also, a question about squatting/leg exercises: I'm afraid of my legs getting too huge, because after the first couple workouts, they really grew! Should I lower the reps and up the weights---would this focus more on strength than size?

Finally, my diet: I'm still figuring out exactly how much food i need, but I don't want to eat too much, because I really don't want to put on any fat--just muscle. Question: do you guys eat the "normal" huge amount on rest days, or do you eat less because you're not working out on those days?

So basically, I'm eating around 3200 calories a day as my base to build, and then I add whatever I burn while running or walking after a workout... though I think I might need more. I LOVE eating healthy foods, and I avoid crap like the plague. I get plenty of protein (though I think I need to learn what a serving size of meat is). Anyways, here it is:

Breakfast: 600 calories: either cereal or a bagel with PB, and a protein shake
Snack: 400 calories: Greek yogurt (18g protein!!), then either some fruit, nuts, or 1/2 pbj sandwich
Lunch: 600 calories: salad and a big meat sandwich (6 slices, i figure ~ 6oz ~200 cal) and then a piece of fruit or something for the last 100 cal
Pre-workout: 400 cal: usually another meat sandwich
Post-Workout: 200 cal: protein shake (25g) and piece of fruit
Dinner 1: 600 cal: bread and meat
Dinner 2: 400 cal: salad, with nuts and/or more meat

overall, i'm getting about 170-180 g of protein a day... Something I wonder about is how much it matters how much food is in my system when i go into a workout at 3:00 (2000 cal), especially if ill be running/walking after and burning another 3-500 cal.