Coming in August for 4 days stay from Sunday to Wednesday, want to know which kind of pass and where to get it at and how much, we have 6 adults, 3 fifteen years old, 3 kids from 12-10 years of age.
Need ride from CDG to Arc de Triomphe to Versailles to Cathedral of Notre Dame.
For Sunday when you arrive, if you plan on just going to hotel and walking around buy single-use RER ticket (10.30€ each) for everyone (discounts are only for kids 9 and under) to get from CDG airport to Paris by train.
The easiest / best pass is Navigo Week pass which you can use Monday-Wednesday, 27.80€ each person, including kids (includes 5€ card fee). This will cover your travels everywhere in Paris area, Versailles, to CDG airport, etc.