Jul 12, 2015 - 11:42 AM
Welcome to MySwissAlps, Kuthialm!
Did you already decide where to stay? If the trip up to the Jungfraujoch is the only thing you want to do in the Interlaken region, you could base yourself in Lucerne and make a day trip to the Jungfraujoch - although that will be a long day. You could also choose to spend one or two nights in/near Interlaken, but mind that switching hotels means that you'll be spending extra time on packing and unpacking. A hotel near Zurich Airport would be convenient for your last night, since you'll have an early flight to catch.
The timetable allows you to find connections for all trips. Just enter the destinations and your (approximate) travel dates and times to find all details. The top of the Titlis is called "Kleintitlis" in the timetable. Furthermore, you can check our pages on the Rhine Falls, Titlis, Jungfraujoch, Zurich, Interlaken and Lucerne. Our planning section may be of help too. Note that there's no Glacier Express between Lucerne and Interlaken. I think you're referring to the Golden Pass instead.
As for rail pass: a Swiss Half Fare Card may suit your needs best. All details about validity and purchase options can be found at the Swiss Half Fare Card page.