Jun 23, 2015 - 8:59 AM
Hello Gunjan, I explored the option of buying multi country rail passes from www.eurail.com/eurail-passes/select-pass and i find that it is not cost-effective. Also it will require additional reservation to be done, pay for night train charges, TGV charges etc. It is better to book TGV on your own seperately from Paris to Basel or Paris to Bern and then you plan to go to interlaken by Swiss trains.
Sinc e you are spending many places in Swiss, i suggest you to go for swiss pass (http://www.swiss-pass.ch/en/swiss-pass/) but there is no pass available for 5 days. You have option to take 3 day pass and half saver pass for next 2 days or take 4 day pass and half-saver pass on the other day. To arrive at a point which is pass is best cost saver, then you need to dig in more with an excel sheet to compare all options. There is a post in this forum explaings which rail pass fits your plans, please see myswissalps.com/ train/ticketspasses/ practical/chooserailpa ss.
These swiss passes does cover local bus and few boats as well. But this does not cover your full journey to Jungfrau. You need to take 50% reduction ticket to Jungfrau from Laetterberen it think.
Swiss Travel Pass points of sale can be found through myswissalps.com/ swisstravelpass/ price.