Since this is your families first trip to WDW, there'll be lots of exciting things for you all to see and do. You'll want to check out as many rides as you can during your trip, so make sure you get to the parks early and you make use of 'Fastpass' whenever they're available.
You also may like to watch a parade or catch an evening fireworks show, these are all wonderful and it's up to you and your family which to choose etc. You may want to try and catch Spectromagic also, as this parade is great!
As for places to eat, there are many and I'm not really up to scratch on this subject, maybe you could hop over to the 'Restaurants' section on the Dis and ask for people's opinions there, most of them seem like experts! I would recomend trying to catch a breakfast or lunch with the Characters, as these are special experiences whilst in Disney and will allow for autographs and great photo opportunities with the main characters!