I would suggest you get a guidebook! I used the Unofficial Guide to WDW by Bob Sehlinger, and the Birnbaum's Official Guide to plan. The Unofficial Guide has sooo much information in it, and the Official Guide will help you for a broad picture of everything WDW has to offer.
Basically, for teens, the best rides vary. Some of the most popular are:
MK - Space Mountain, Splash Mountain, Buzz Lightyear's Space Ranger Spin, and Big Thunder Mountain Railroad
Epcot - Test Track and visiting World Showcase (maybe that's just me though lol)
MGM - Tower of Terror, Rock n Roller Coaster
AK - Kilimanjaro Safaris, Dinosaur
Hotels really depend on your family's budget. If you know you can spend $200-300 a night on a room for a deluxe resort, then I would suggest the Boardwalk or the Yacht and Beach Clubs. If your family wants to spend less money, there are the All-Star Resorts which are around $80 a night, or the moderates which are around $120.
I can't help you with the restaurants because there are so many of them! Come back here for specific questions on that one, or post on the restaurants board.
At WDW, though, you should try to see as much as you can, because then you will know for sure what you yourself like and dislike.
