Welcome to 3FC
Putting half the food in a take-home bag was a good start. Did you then eat those things later, though?
At any restaurant don't be afraid to ask for food to be made a certain way. It's your money, and most places don't mind making things a little differently.
Here's one thing I noticed immediately: Where were your fruits and vegetables for the day? I saw... a vegetable stir fry... which likely didn't hold all your daily amount of veggies.
Starting with breakfast: I'd stick with eggs. If possible, I'd ask for scrambled eggwhites with many vegetables. This not only bulks the meal up, but adds in much needed veg. I'd skip the hashbrowns entirely. I would not put butter on the slice of toast if I'm looking to save on points. I'd actually eat more egg whites and no hashbrowns if given the option. Make that toast wheat bread, too.
As for a cooler... you can keep fruit and sliced veggies on hand with very little maintenance. How cool are you able to keep a cooler? Yogurt and low-fat cheeses might go a long way to helping you keep hunger at bay.
Nuts or certain types of trailmix bars can come in handy on the road, as well. They keep well, and are often very hearty.
Are there other food vendors where you go? Take a close look at what they offer, there may be better choices than kielbasa.
I hope that helps to start! Give it time, you'll come up with some great solutions and be able to stick to plan