Prices would be:
Hotel: You have a couple options. I would suggest getting either 2 rooms or a large room which will fit all of you. If you stay in a large room, you would have to stay in a deluxe hotel because they are the only type to fit a party as large as yours. The large rooms are called 2 bedroom suites. They have two bedrooms, a sitting area, 2 bathrooms, and ceiling fans. The first bedroom has a king sized bed and the second has 2 queens sized beds or 1 queen and a bunk bed. The parlor has a pull out sofa. They entire room can sleep all of you. Since this a large room you will get really nice amenties like evening turndown with chocolates, keys to the Club Lounge, health club access, and delievery of US Today. These rooms are currently available at Animal Kingdom Lodge for $12384, Grand Flordian for $15,032 or at Saratoga Springs for $6,948. You could to multi room which wouldn't be as nice... you would still have to stay at a deluxe resort and when you are booking you have to request that the rooms be near each other or have connecting doors.
Tickets: Assuming you are staying for 7 days ( if your staying for more you can look at the sources), the prices would be $35 for adult (ages 10 and up) and $32 for child. That is a base ticket which lets you only go to one park per day. With park hopper, allowing you to go to 2 or more parks per day the price would be $43 for adult and $40 for child. With water park and more option, allowing you to go to the waterparks and Disneyquest, the price would be $43 for adult and $39 for child. If you want both, it would be $50 for adult and $47 for child.
Actually, it would be way cheaper to stay as one group instead of a two family group. If you did want to break up into groups, you would have to stay at sepreate resorts which I wouldn't want to do.
Universal tickets - The price for adults for a 2 day pass is $135 and kids are $122.