Welcome to Spark People !
As others have noted, when it comes to losing weight, what matters most is what we eat. Good nutrition is what takes the weight off and keeps it off. Exercise is what keeps our bodies fit. In short, you can't outrun a bad diet with exercise. If you want to lose weight, you have to do your best to eat right and watch your portions.
A person can eat healthy on a budget. If you don't like bananas, what kinds of fruits do you like to eat ? How about oranges ? strawberries, kiwi fruit, apples, pears, etc... to save money, buy fruits and veggies that are on sale. Don't be afraid to try something new. You might be pleasantly surprised.
If your family doesn't have enough money to buy fresh veggies, then buy frozen veggies. Most stores have house brand frozen veggies. I can find broccoli, cauliflower, peas, spinach, kale and corn. When you eat dinner, why eat one serving of veggies, when you can have two ? Potatoes are OKAY !!!!
Baked potatoes or boiled potatoes are fine. What makes potatoes fattening is when people turn them into French fries or load a baked potato with heaps of butter and sour cream. Potatoes (especially sweet potatoes) can be very nutritious as well as filling.
Beans, eat more bean. they are considered a super food. You can put beans in salads, red beans and rice, beans and pasta, beans in your soup. Beans are high in protein and very good for you. So, how about asking your parents to add some more frozen veggies to dinner ? have an extra serving of spinach or broccoli with that baked potato and lean meat.
As far as exercise, you've been doing fine. Walking is wonderful cardiovascular exercise. There are members who will tell you how they lost 100+ pounds just by walking and watching what they ate. In fact, I'm going to encourage you to "friend" member INDYGIRL. at her highest weight, she weighed over 460+ pounds. Two years later and she's lost half that weight. www.sparkpeople.com/mypage.asp?ID=~INDYGIR
Also, how about making a nice salad ? If you're sick of turkey, add some grilled chicken, canned tuna, beans (like chick peas), slices of onion, tomato, etc... there are lots of great ways to make a salad. You don't have to eat salad all day.
But I will say this, if you want to help your family save money, tell them to buy a head of romaine lettuce instead of the bagged stuff. I bought a head of romaine lettuce at my local supermarket. It cost me $1.50. that head made 4-5 salads for me. A bag of pre-clean romaine costs around $3.50 and only makes a couple of salads.
It takes time to change eating habits, so don't beat yourself up if you're not perfect. You don't have to be perfect to be healthy. BUT, you do have to be mindful of your portion sizes. Most Americans really don't realize how much they're eating. Most times, they are eating too much.
So, take things slowly, you will learn with time. And there really is a lot to learn.
Here's an article you will also find helpful. It's ways to eat healthy on a budget. www.sparkpeople.com/resource/nutrition_art