There will be two of us traveling on a Tuesday thru Monday several times on the Metro, zones 1-5. (Paris) I'm confused about the best type of ticket to purchase. We could use it up to 3 times a day, but probably not more than that.
Also, I saw with one type of ticket, one needs to have a photo ID of a certain size. I plan on arriving at the airport earlier than my friend, so can I purchase his Metro ticket and mine with only my ID?