Please help me plan my trip

Hello Kunal, and welcome to the forum! I think Lucerne would be a great base for a 3 to 4 day stay in Switzerland. The trip to the Jungfraujoch will take quite some traveling time, but it's doable. Lucerne and the Lake Lucerne region and have lots to offer, including some famous viewing points such as Pilatus, Rigi and Titlis.

For your further planning, I suggest that you browse the forum for further ideas. The timetable will assist you in planning your trips. The trips from and to Paris can be found here as well.

It's hard to say whether you're better off with a Eurail France-Switzerland Pass or with a separate Swiss Pass. This depends on the amount of traveling you plan to do in both countries. If Paris-Tignes-Swiss border is the only trip you'll be making in France, the Eurail Pass would probably be too expensive. If you'll be using the main rail network in both countries quite intensivetly, the Eurail Pass might work. Cable cars, mountain trains and other local transport companies aren't covered as much as with the Swiss Pass though. Another difference is that the Eurail Pass is available in 1st class only, whereas the Swiss Pass comes in a cheaper 2nd class variant too. You can best make a list of your plans and then compare both passes. You can even calculate which one is cheapest if you like.

Does this get you started? Have fun preparing for your trip!

Hi Kunal. Your travel plan should work. Just note that you can't actually visit the Eiger (the train to the Jungfraujoch does cross the mountain though), but you can combine both the Jungfraujoch and Interlaken on one day. Pilatus and Rigi on the same day are doable too. I'd spend the first night in Interlaken, if I were you, and the following ones in Lucerne. Traveling times to and from both towns can be found using the Swiss timetable. You can search for hotels here.

As for your inbound trip: you'll probably be entering from Geneva. The Swiss Pass will cover the entire trip up to Interlaken/Lucerne. The exact trip and traveling costs from Tignes to Geneva can be found using the French timetable.