Oh Paris

I am travelling to Paris (France) for the first time next week. I have a reservation with the Marriott hotel whose address is given as "91, Blvd Charles De Gaulle, Colombes, 92700 France". Could someone please let me know the following:
1) How far is the above hotel from the Charles De Gaulle airport?
2) What is the transportation from airport to hotel? How much is the approximate cost?

We will be landing at Charles de Gaulle airport in Paris and are staying at the Arc de Triumphe Hilton hotel.

We would prefer public trasportation to save money if possible. Perhaps take the RER closer to the city then a taxi from there?

Thanks!

What is the best way to get from Charles De Gaulle airport to Hotel Novex in 13th Arrondissment? The address is 8 Rue Caillaux, Paris. Also, is this the best (cheapest) way to get there?