<<"Day 1: Arrive in Zurich Airport (around 1930 hrs) . I guess nothingcan be done when i am reaching so late? Any suggestions? Transfer to anovernight hotel near airport.">>
Looks good. Hotels near the airport tend to be more expensive than elsewhere.
If you are coming from a Schengen country, you can be on a train within 45 minutes of your arrival. Otherwise, you have to go through pass control and customs; count on a hour or 75 minutes..
See attached screen grab from the SBB website.
After 2000 trains to Bern leave 3 times per hour, with the shortest trips about 1 hour and 10 to 20 minutes.
Downtown Zürich is easily accessible - many trains per hour - and offers more variety and potentially lower prices.
<<"Day 2: Get up early and head to Mürren directly (via Bern). Should we stop over Bern for 2-3 hours for any sightseeing? at all useful or it cant be covered in 2-3 days. ReachMurren. Settle in the hotel. Take a walk around the place. Need your suggestion if we can do some activities in evening.">>
Bern is a really good place for a 2-3 hour break. You can leave your luggage in lockers or at the Left Luggage office.. For a fee, of course. ;-(
Walk from the main station directly into the old town. Follow any of the arcaded streets down to the Nydegg Bridge. Best to start on Neuengasse close to the side exit of the station, then jog over to Marktgasse and go past the clock tower, continuing on Kramgasse. Look the shops, fountains, old clock tower on the way. At the bridge, glance at the bear pits.
Cross the bridge. Walk up to the Rosegarden. Not many flowers then ,but super views over Bern. Grab a bite if you wish at the cafe up there, or at the Old Tram Station restaurant near the bridge.
Take the #12 tram, or walk, back up through the old town to the station, catch the train to Interlaken Ost , then to Lauterbrunnen, then by choice of routes to Mürren.
There is not a lot of night life in Mürren, especially in off season.
<<"Day 3: Excursion to Jangfraujoch, explore Lauterburren">>
Jungfraujoch. Early in the day is usually less cloudy. Lauterbrunnen. A nice walk along the valley floor , including some beautiful waterfalls.
<<"Day 4: Excursion to Schithorn, walk down to Gimmelwald and back.">>
Schilthorn. Your spelling is inappropriate in English. ;-)
You'll have time to spare. Don't know if the Gimmelwald trail will be free of snow, ice, or other slippery nastiness. Wear shoes that are more waterproof than sneakers. Soles will need a good grip.
<<"Day 5: Take Golden Pass to Lucernce. Explore the old town, stay in Mount Pilatus.">>
Sounds like a nice day. Not sure which route or routes to Pilatus will be open. (Cog rail from Alpnachstad or cable way from Kriens.)
There is not much to do up on Pilatus except walk a short distance, look at the scenery, eat, drink, and sleep. If the weather is cloudy, "look at the scenery" does not work. Spend more time in Luzern before you go up.
<<"Day 6: Get down from Pilatus, take a cruise to Flulen. ">>
Flüelen. Great boat ride. Hope you can go downdirctly to Alpnachstad and make the boat connection(s). Good if cloudy. Spectacular if the weather is clear. Train back to Luzern is best for speed.
<<"Day 7: Mount Rigi/ Mount Titlis, transfer to Zurich.">>
All possible. There is really nice walk on the Rigi which may be clear because most of it is on the sunny side. Needs clear weather to get the good views.
Study the map. You can pick up the trail at Rigi Staffel Höhe train station, head out across the meadow and go past Känzeli and swing back to to Rigi Kaltbad and catch the cograil down to Vitznau.
Other options exist if you are interested.
<<"Day 8: Explore Zurich, visit Rhine Falls and if possible Black Forest," Sounds ambitious.
The falls may be getting spring rain water or snow melt....otherwise, they are powerful but not where I would spend time. Opinions vary.
Zürich is not a major tourist city. It rewards longer stays with culture and immersion in the city.
For some nice places to walk, look down the thread in :
<<"Day 9: Depart from Zurich.">>
Ask questions if you need more detail.