Hi shavmcv,
Firstly, posters here have given you some great advice, but bear in mind that DLP changes with the seasons and years, so some things mentioned here are no longer current or available.
There is an ongoing PRICES thread on the Trip Advisor DLP / Marne La Vallee forums which posters add to when they return, so that includes prices of food and merchandise which should help you.
If you look on the MLV forum page, right hand column, you will see a list of Top Questions. There is one titled ' How much do things cost, and how can we save money? '.
Click on that question, and you will see various links to help you with tips and advice, including the PRICES thread.
www.tripadvisor.co.uk/ShowForum-g226865-i2224-Marne_la_Vallee_Seine_et_Marne_Ile_de_France.html
The reason there are two forums for Disneyland is because until recently DLP questions were under Marne La Vallee, but we now have one just for DLP as well. Both forums are linked and have Top Questions. All posts on the DLP forum appear on the MLV forum page as well.
www.tripadvisor.co.uk/ShowForum-g2079053-i21935-Disneyland_Paris_Marne_la_Vallee_Seine_et_Marne_Ile_de_France.html
Anyone can read the questions and posts on TA, but you have to sign up to be able to post your own questions. Regular posters ( including me! ) are always very happy to help in any way that we can. It is a very friendly forum!
The Dibbs and DISboards are also very good forums, so it is a matter of personal choice, and which forum layout you prefer and find easier to navigate, or even use all of them!
We try to keep our posters updated as much as possible, and also have a DLP Latest News thread so you can read what is going on there now or in the future...
You will also find a lot of useful information for a trip to DLP on this site, including restaurant menus and prices, park maps, ride descriptions, how to use Fastpass ( or see Top Questions on the TA forums )
www.dlrpmagic.com/guidebook/
You don't say exactly when you are going, or where you are staying, so it is difficult to advise more without more info. You will only see Fantillusion electrical parade and fireworks if you are going in DLP Summer Time from 9th July to 4th September. It is also on some special celebration days of the year, and usually during Christmas Celebrations which begin in November ( although word on the streets is that it will not be on this winter ).
You will get Extra Magic Hours in the Disneyland Park from 8am - 10am if you are staying in one of the 7 Disney owned hotels, or Hotel Elysee Val D'Europe as a hotel / tickets package, or have Dream Annual Passports. This is not available on a few days of the year though. ( like at the end of September when they are preparing the parks for Halloween Festival beginning in October ).
Lucky Nugget Saloon that was mentioned is a good buffet lunch in frontierland, but no longer has Characters. This has been moved to Cowboy Cookout BBQ also in Frontierland, which is counter service fast food with some choices, so cheaper.
Cafe Mickey restaurant in the Village is table service, and used to be a set price for 3 course meal only, but now you can also just order food from a main menu like pizza, pasta, chips etc, so not as expensive. You can still pay a set price for 3 courses with choices of starter, mains and desserts.
It is very hard to tell someone how much money to take, as people are not all the same, some eat more, and some like more souvenirs than others! It can also depend on whether people have booked Half Board vouchers.
If you are staying in a Disney owned hotel you can use your hotel Easy Pass like a credit card, and pay using your bank or credit card at the end of your stay, or be debited automatically with Express Checkout. Keep track of spending though!!
I had better end here - once I start talking about DLP it is hard to stop!
I have answered other DLP questions on Mumsnet when I am not busy with the TA DLP forums, so scroll through the Topic list to find the DLP ones here.
Hope you have a Magical Time!
( I am there again in the first week of October -hurrah! )