1. Re: Train travel from Frankfurt to Paris
You can use to book your train from Frankfurt to Paris. However, fares aren't posted until 92 days before the travel date.
From: Frankfurt(M) Flughafen Fernbf
To: Paris Est
Current fares for trips are running from 69 € to 120 € for the "Savings Fare" or the "Standard Fare." For the best deal, book the savings fare right at the 92 day mark; they go up as you get closer to the travel date.
When you purchase a savings fare, you MUST ride the specific train(s) that you booked. A standard fare allows flexibility. That can come into play if your flight is delayed, so make sure you allow enough time. If you miss that specific train, you're buying another ticket.
You will be required to reserve a seat when you purchase your ticket.
Depending on the route that you select, the journey will last from 3:55 to 7:52, and you will have to change trains at least once.
There are luggage storage areas at the end of the coach, or you can store your luggage in a rack over your seat. If you have a lot of luggage, storing it and getting it off the train and carrying it through the station to meet your next train (sometimes in less than 10 minutes), could be a challenge. Pack light.
Here are guides on riding trains in Europe:
Traveling by train is a little easier than flying, as you don't have to arrive at the station early to go through security check points.