What is more more expensive, WDW or
Disney Cruise Line? What restaurant should we go to (we have 6 kids and 4 adults)? Should we get autograph books or just plain notebooks? What resort should we stay at? Should we include the dining plan? Thanks!!
First, a DISboards tip....you'll generally get a lot more responses, and more detailed responses, if you post individual questions on the boards that are specific to that subject.

Your autograph book question would be a great one for the
Theme Parks and Attractions board, and the folks on the
Disney Dining Plan board can help you figure out if the dining plan is right for your family.
We also have a
Restaurants board to help you with that decision....there are dozens of restaurants on Disney property, with varying price ranges, all kinds of cuisines, and assorted themes, from buffet-style character meals to interactive dining where you become part of the 'show', to some of the best fine dining in the Southeastern US. Lots and lots to choose from.
Now (finally

), on to your questions about resorts. There are more than 20 separate resorts on Disney property, if you are looking to stay on property. I'd start with this link:
Disney Resorts
You'll find rates and detailed descriptions for all of the resorts inside WDW. That will help you narrow down what combination of price and amenities suits your family's needs. Then c'mon back and ask lots of questions here.
As for which is more expensive, a cruise or a WDW vacation, the only answer is "it depends". On the length of the cruise you're interested in, the kind of cabin you'd want to book, compared to the level of resort you'd be interested in at WDW, what kind of dining you'll be doing, and what sort of park tickets you'd buy.
The best thing to do is to hit the WDW site and the
Disney Cruise Line site, and start pricing out vacations.