You don't need Tupperware (REALLY expensive!). Stores now carry inexpensive storage containers that work just as well for a lot less money (like Gladware).
All those carby things in your cupboard? If they're unopened, how about donating them to the local soup kitchen or food pantry instead of tossing them in the trash? While I know that these are not "healthy" foods for most people, those who are starving have more pressing issues than eating healthy...they just need to eat.
Look for already chopped and bag salad fixings on sale. Most grocery stores put them on sale regularly.
Good luck!