I was on this site the first time when I was a college chick and successfully lost 100lb while living in a situation like that
My suggestions are to pick whatever day of the week you are the least busy and prepare meals... prepare all your breakfasts/snacks/lunches for the week and pop them in the freezer. I was pretty busy full time studenting/working several jobs/ministry/gym... so my biggest issue came when I didn't have a plan.
Fresh things I keep:
-Baby carrots (or if you have time buy whole carrots and pre slice them)
-Lettuce/Spinach
-Apples/bananas
-Hummus (you can make your own but plain hummus is easy to buy too)
-Celery
-Onions
-Eggs
Cupboard
-Oatmeal
-Dried beans especially lentils. I love to make a lentil stew with lentil/carrot/celery/onion.
-Different spices and seasonings
-I liked hunts pasta sauce (in the large cans). It was cheap and I liked to put it on frozen veggies.
-Brown rice... maybe some whole wheat pasta but I don't eat that often and when I do I do about 1/2 serving and replace the rest with frozen veggies
Freezer
-Ground Flax seed (store in freezer after opened), great for adding protein and fiber to smoothies
-Frozen chicken breasts/fish filets
-Frozen fruit... strawberries/pineapple/other berries
-Tons of frozen veggies, particularly for me broccoli and spinach
I shop at GFS to save money on food. I didn't discover it until around the end of my college days but it was awesome... check if you have a bulk food place in your area.
I would buy some tupperware in different sizes so that you can cook recipes and portion them up individually to put in the fridge or freezer. That also means at least one large pot if you have a place to store it. Making a large batch saves so much time.
Measuring cups and spoons are important if you are counting calories (which I found is the best way for me to lose weight), and you will want a food scale as well, Walmart sells a cheap one that works just fine.
I like to have a muffin tray handy because I can pre-make a lot of breakfast foods this way and put them in the freezer already portioned (like eggs/healthy muffins/etc).
Another thing you might like is a small blender. I like to throw some frozen fruit, frozen bananas, flax seed, spinach, etc in the blender and make a snack or meal out of that sometimes.
I highly recommend finding a website to use to count your calories if you are trying to lose weight. I liked SparkPeople in the past and now I use the calorie counter on my fitbit just because it's in one place. It's different for everyone but for me I try to keep my carb intake low. I still eat veg/fruit carbs but try to keep all other sugar and bread/wheat out at this point. I recommend eating mostly whole foods. One of the only processed things I still splurge on are the hunts pasta sauces though if you have time you can always make your own.