Hi there, Jennifer!
Every Walt Disney World Resort hotel offers a small convenience store on-site, which sells a wide variety of pre-packaged grocery items: cereal, crackers, etc.. More recently, refrigerated cases have been added to offer fruits and other fresh items; this is particularly true of Value and Moderate Resorts with food court dining options.
Downtown Disney - accessible by Disney motorcoach transportation - has some restaurants that you might consider options for takeout. A
full list can be found on the
official Downtown Disney Web site.
Also on Walt Disney World property - but not part of the motorcoach loops - are a couple of gas stations featuring traditional "mini marts," and a McDonald's. For these options, you'll need to hire a taxi, a fairly inexpensive option, and readily available at your Resort hotel.
Have a wonderful trip!
See you later, celebrator,
-Deborah B.