Hi, Everyone - Just got back from my 3rd trip to Paris in 2 years. Still consider myself a newbie and have just scratched the surface.
I just wanted to let anyone who has questions about credit card and money logistics how it went for me this time...
We took 150 euro with us (saved from our last trip). When we needed cash, we used our debit card in the ATM. Insert your card, then it asks which language you prefer and you can take it from there. If your card won't go into the machine, turn it around the other way.
We were able to use the Chase Sapphire Preferred in the metro ticket machines. The Metro ticket machines have a language choice option, so were a piece of cake to use.
The taxi cost about 70 euro from CDG to Metro Pasteur in the 15th where we stayed. Cost us about 15 euro to get from the 15th to Opera Bastille, Opera Garnier, Salle Pleyel and those neighborhoods.
None of the taxis we took accepted credit cards - they were cash only, including the G7 taxis.
They all used GPSes. So if you give them exact address where you are going, they key it in and you can watch where they are going. I didn't feel like we got ripped off.
Personally, I would take a taxi from the airport into the city. The taxi rank is marshalled. If the car is smaller than fits your baggage, you just wait until a larger car shows up. It doesn't take long...
We used the credit card almost exclusively at the Monoprix and Casino stores, all the restaurants and museums, too. The only place we used cash was at the marche on Bd Raspail.
This was my experience... Hope it helps!