Training/diet tips? (for teens)?

I've always wanted to lose some of my extra body fat, and have been astonished by some people's success story's. Im currently 14, 5'9 and weigh 170 pounds. I have A few pesky lovehandels that I would love to get rid of by summer.

OK, I know this may sound like a bit of an excuse, but I can't follow diet's to the strictest extent, im 14 and don't normally stock my fridge, and my parents don't put on weight like I do (they can eat a whole pizza and lose weight!). So we usually tend to have unhealthy food in our house, which I am usually pretty good at staying away from, (afew years to late, though.) I play hockey at a competitive level, and gym class of course, but that's about all the training i get. I know this may sound bad, but running in -20 temperatures up here in northern Canada tend to keep me inside.. Is there any indoor cardio workouts anybody has to contribute? A treadmill is something im saving for at the moment.

I DO have weights and a small home gym available at my neighbors, but i am completely lost, I have no idea what plans, diets, or cardio routines to follow for that matter. He owns a "Impex Competitor", a full set of weights, and a bench press.

any tips for beginner?

-Thanks, Craig.