Ok here goes:
The day you are visiting, both parks are open 10:00 - 19:00. Not much time to tour.
If I only had one day to experience the parks, and wanted to do things unique to DLP here's how I would do it:
Be at the Studios entrance by 9.15, (this will mean arriving at the train station which is literally opposite by 9) head in as soon as you can and go to Crush's Coaster. This ride is amazing and the only reason you should be in the park. You will probably get out of there about 10.45. I wouldn't bother with any of the Magique shows.
Leave the Studios and head into Disneyland Park. Go grab fastpasses for Thunder Mountain (which will probably be for about 2/3pm by that time). While that side do Phantom Manor. Any of the counter service services this side of the park are good, in particular Fuente Del Oro and Lucky Nugget. For a sit down Silver Spur. It is not more expensive to eat in the park (I was there last week again). The most expensive meal at Fuente for instance is Fajitas, Mexican rice, churros and cold drink for 14.99 euros. Kids meals are 7.10 euros, but was 2 sausages and plain rice so would order them an adults if they would like more flavour. Some restaurants give you a voucher with your lunch for a hot drink after 3pm, that can be used across a few outlets.
You'll probably have time to do PotC, assuming it has reopened, then head for Thunder Mountain.
I'd then head across the hub into Discoveryland to see if fastpasses still available for Space Mountain and if not queue for it. It is low season, the queue should not be more than 45 minutes. Buzz Lightyear is closed when you are there, Star Tours is the old version.
Come back out of Discoveryland and head under the castle to see Le Taniere du Dragon, it's pretty cool.
You should be able to catch the parade at 16.45, I really love this one.
Through the castle into Fantasyland. Alice's Maze is pretty cool as is IASW version, and while you are there why not do the Snow White ride (just because you can!). The back rides (Casey Jr and the storybook boats) are closed when you go.
Fantasyland will close at 18.00 to prepare for Disney Dreams. This is not to be missed. A good spot is the railings to the right of the castle enroute to Adventureland. Or front center of the hub. Be prepared to literally fight to stay in your spot. Do not be surprised to see people climbing trees and scrambling over the grass to get a better view. Some of DLP's guests are complete pigs.
Before you leave check out both sides of the undercover arcades that run parallel to Main Street. I spotted my first hidden mickey in one of them
Mass exodus into Disney Village. King Ludwigs Castle is a nice place to eat, not too expensive. Billy Bob's does good bar meals. You may have to wait for a table but most of the restaurants have bars. I quite like Planet Hollywood. There is also a Rainforest Café, and Annettes Diner.
Above all, remember you are in France. You will have cigarette smoke blown in your face, the park does not have the WDW smell. You will get queue jumped. You may witness frequent arguments between guests. Park merchandise is ridiculously expensive. We order our Christmas decorations online through the park merchandise tab.
BUT: Take that away and Disneyland Paris is my favourite of the parks, I love the way it is laid out, the uniqueness of some of the rides, the Main Street arcades, Disney Dreams. Have a great day!!!
And here is the show schedule if you decide to do any of the Magiques:
http://www.disneylandparis.co.uk/content/GB/EN/Neutral/system/images/ShowsAndParades.pdf
