If you fly into Roissy Charles de Gaulle airport in Paris you will be able to catch a train from Terminal 2 which will take you to the city centre in approximately 40 minutes. Trains leave every few minutes and you will be able to take your stroller on board quite easily however, remember that the station that you arrive into may not have an elevator so be prepared to carry your stroller up a few flights of stairs. Taxis are available in the arrivals areas of Terminals 1 and 2. You can also book a taxi with a car seat to meet you on arrival in Paris from a number of taxi companies including Paris Cab Service. This company also arranges tours around Paris and trips to Disneyland. Rental car agencies are located in Terminals 1 and 2, but be aware that traffic congestion and limited parking is common in Paris. If you require a car seat you will need to prebook to ensure availability. For rules on car seats in Europe, click here.
If you are travelling to Paris by train, either from England or from other French or European cities, you will generally arrive at Gare du Nord or one of the other large stations within the city. These stations will have access points to the Paris metro and you will be able to find taxis outside.