Morning!
There are tours put on by DLP, if you go to their website you can find info there on tours and shuttles
http://entertainment.disneylandparis.co ... dex.xhtml#
However, I have been reliably informed that it is just as easy to do using RER. I am not a confident traveller, but my husband works in Geneva and Munich and doesnt speak any French or much German says its pretty easy.
These directions were given to me by another forum member-I am sure someone will jump in with more helpful advice!
If you go on the RER you get off at Charles De Gaule Etoile. Then jump onto the metro line 6 heading towards 'Nation'. If you get off at Bir Hakeim you can walk towards the Eiffel Tower.
Then the world, or rather, Paris, is your Oyster.
There are different tour buses you can take, plus the boats (Bateau Mouche etc) that will take you up the Seine.