There is a wealth of knowledge with the members of this site, but you would need to be a little more specific for us to help you most! What sort of budget are you working with and what sort of accomodation would be best ie hotel or self catering?
People have started the ball rolling and I will add a little of my advice here.
There are six hotels owned and run by Disney, They are all within easy walking distance of the two parks, but have a free shuttle bus service for when the legs are beginning to feel it! The hotels in order of cost are Disneyland Hotel, built at the park entrance (The pay booths are under the hotel!) Hotel New York,Sequoia Lodge and Newport Bay which are all situated around Lake Disney. The New York is the least "Disney" hotel and hosts a lot of conventions. It is my favourite as I cannot afford the Disneyland Hotel and it has a more "adult" feel about it. The Sequoia Lodge is based on a US national park lodge, lots of wood and is fabulous in the winter season with a roaring log fire in the bar! Newport Bay is a New England Yacht club and is best in the summer, in the winter the light white paint scheme seems a little "cold". The last two hotels are the Cheyenne, built as a wild west town and a lot of fun! Rooms here have a double bed and bunk beds. Lastly the Santa Fe built as a New Mexico Pueblo type town, the room s here have recently been refurbished with a "Cars" theme, great for kids, but a little childish for us older ones!
Next come the four "partner" hotels. These hotels are about 10 minutes away by regular and free shuttle buses and represent far better value than the Disney Hotels, in my opinion. The least expensive is Hotel Kyriad, part of a low cost French hotel chain, it is rated as two star, but I believe it is as good as all the Disney Hotels except Disneyland and New York. The next two hotels are the Magic Circus (Previously a Holiday inn) and the Dream Castle. Both of these are run by Vienna International and are true 4 star hotels, the quality and price exceeds all the Disney hotels except the Disneyland.
The Hotel that I would recommend for you here is the Explorers hotel if you want to stay in rooms together with out self catering. The clever design of the rooms here mean that they offer two room with two double beds joined by a smaller "room" with bunk beds which means they can offer rooms with capacity from 4 to 10 people, ideal for your group!
The other area which is nearby is Val de Europe which is a large shopping complex with shops restaurants etc. It has several hotels, including some where you can self cater. Val de Europe is about three minutes from Disney by RER the Paris metro system. I have never stayed her, but several members of the forum have and I am sure they would be happy to help.
As Elaine, one of the wisest heads on this forum, said. Don't expect Paris to be the same as the US there are several things that are not as good (entertainment is pathetic!) and the weather could well be cold in October, But the design and layout of Paris makes it the most beautiful of the Disney Parks and I believe that our "magic kingdom" is the biggest!
Bring on those questions