Like PP have said, really no need to stress about visiting DLP. Even for a visit in peak season, 3 months out is perfectly ok to start the planning. For example I took my mum to DLP over Christmas, we arrived December 23 2013 and left December 27 2013. We booked the hotel, flights and park tickets package in September 2013, then in October I did the ADR.
The ADR is done by phone, and only really necessary if you are going at peak time. I did ADR for Blue Lagoon ( Blue Bayou in USA Parks) for December 26 as I knew it would be full capacity in the park that day. Most people either do the ADR the week before or when they arrive either at their hotel check in or at Town Hall.
If you are staying onsite you will get a paper Hotel Easy pass for access to EMH. Depending on which hotel and accommodation level, you may also get a Hotel Fast Pass, which again is paper.
The ride fast passes are the paper kind from the machines at the rides so no need to pre plan before your visit.
Like PP has said, check the different countries websites not just the USA website for different deals and offers. Disney do this as different countries want different types of vacations, for example, the French and German sites may have better offers for shorter stays and the UK and Irish may have better offers for longer stays.
The Irish website (in English )
www.disneylandparis.ie
The UK website (in English )
http://www.disneylandparis.co.uk/
The French website ( in French )
www.disneylandparis.fr
How to start planning
1. Wait until you know the dates you you can visit DLP
2. If you are just planning to do Disney and stay onsite, then 4 days is plenty for the 2 parks
3. Decide your budget
4. Once you have your budget, look at the hotels. The hotel prices are basically ranked for distance to the park. The
Disneyland Hotel is the entrance to the park, The New York at the Disney Village (Downtown Disney) The Sequoia near The New York, New Port Bay near Sequoia and the Santa Fe,and Cheyanne, the budget choice, the furthest out from Disney Village.
5. Breakfast is included as standard in all the hotels. The standard breakfast is whats known as a continental buffet. This means a buffet with a selection of cold meat and cheese, cereals, toast,croissants, pastries, fruit juice, tea and coffee. Some of the hotels have a different breakfast depending on whether you are staying in the more expensive rooms
6.Disney really push the prepaid meal plans, but I have visited twice and prefer NOT to pay for the meal plans. For the meal plans you pay in advance and get vouchers for lunch and dinner for each day of your visit. The vouchers can only be redeemed at certain restaurants and there is usually a special menu for the meal plan vouchers at the restaurants. For me personally 2 full sit down meals in a day is too much, and I don't like to be tied to only eating in certain restaurants at a set time and from a limited menu. They seem to be better value and more use to families with children.
7. As a WDW pro you will be extremely surprised by the ease and compactness of DLP. Even the furtherest onsite hotels, the Chayenne and Santa Fe are only about 30 mins walk from the park entrance (although most people use the free shuttle buses) The two parks are beside each other and very close to Disney Village, very similar to Disneyland California. Most people park hop multiple times in the day.
8. There are a number of rides and attractions unique to DLP.
Pirates - is the original ride and has no film references, no Captain Jack
Haunted Mansion is Phantom Manor - similar but not the same and has a spooky graveyard called Boot Hill
The Castle - taller and different shape to WDW and DL, has an upstairs walk though and a dragon underneath
Indiana Jones - a roller-coaster similar to BTM
BTM - is on an island and has an underground part to get to the island
Main Street - has two covered arcades which are at the back of the shops. One of the arcades is the start of the hidden covered over walkway which goes through Adventureland down to the back of the park to Pirates and Peter Pan in FantasyLand
Crushs Coaster and the new ride Ratatouille in the studios
I know there is alot more but thats I can think of off hand