Well, at least you're all on the right track. There's only one way to lose weight, and it's not by eating "lite" and "low fat".
I was weighing 180+ lbs back in high school, then I stopped eating fast food and drinking soda. Seriously. That alone can help you lose at least 20 lbs in a couple months (depending on your eating habits already). If you have a job, that'll help even more.
Without a car, I have to walk for over an hour to get to work. And then back again after working in a warehouse. No matter how much I eat, I can't get above 143 lbs.
Making food yourself is definitely healthier, too. Water is great because if you're hungry, drink a glass and you're pretty much satiated. Personally, I put at least a teaspoon of sugar into almost everything I eat/drink, such as just simple water, rice, some sandwiches, and hashbrowns (I see you making a o.O face but it's good). It'll keep your energy up.