Listen kid, it's better to ask a million questions than to go out and mess yourself up. Ask all you want, that's what this forum is for.
As for your diet, eat somewhere around 6 meals a day spaced out to every 2-3 hours. You WILL need fat in your diet, but not junk fat. Bad fats are the ones you'll find in fast food and the like. Good fats are in fish, red meat, nuts, etc.. For carbohydrates, it's best to limit your simple carb intake and go with complex carbs during the day. You will want simple carbs for the meal right after your workout. Try to have some protein in every meal, even your snacks. That doesn't mean you have to go crazy loading up on protein, just keep a steady intake. I'm not going to list all the food contents here as it would take me all week. Do some research on the web.
As far as your workout, you can do some form of aerobic exercise every day. Best to change it up if that is the case. For instance, it's easier on your body to bike one day the run the next then swim the next and repeat. Make sure that you do your weight workout BEFORE you do aerobic exercise.
Since you are new to lifting, you are going to need some core strength before you start 'isolating' muscle groups. Do a regiment of Dead Lifts and Side Presses for a couple months at least before you move on. These two exercises will work your entire body; there is no need to do anything else. There is a fantastic beginner book on these two exercises here. You can also buy the video to SEE what the form is supposed to look like. I have both and it helped me out quite a bit.