<<"thank you so much slowpoke. actually its just my excitement to see as much as I can in the 3 days that I am staying in wilderswil but I realise it would be not be feasible. instead can I do Mt Titlis along with brienz cruise n Mt Pilatus along with Lake Thun. that should be alright I guess???and the third day I can go to Jungfraujoch also">>
As noted elsewhere - use the timetable (and a map)
Here is a map that I use:
( happen to prefer the old interface because I am used to it:
Either on will do for what you need.
If you look through the list of what you say you want to see, you have identified places near the Jungfrau and laces near Luzern.
You have not identified any places near Lausanne, and Lausanne is not the usual base for exploring what you say you want to see.
Pilatus and Titlis are best accessed from Luzern, as is the Rigi, another, more "gentle" mountain.
So, if I were personally doing what you say you want to do, I would book my stays in Luzern and the Berner Oberland. Each base has plenty of scenery, including mountains and lakes and villages enough to occupy more than a week on its own. Each has low altitude options in case the clouds have destroyed the views from the Jungfraujoch.
I would build upon my list for each of those two areas. The scenic train ride between the two via the Golden Pass Route is usually recommended by the moderators. Using the timetable, enter Zweisimmen as a "via" stop between Luzern and Interlaken ( or Wilderswil.)
That link takes you to a page with a "via" box for entries.
One Item I would add, as suggested elsewhere in the thread is Schynige Platte. It starts right in Wilderswil. ( Be careful with the kids on the trail that goes right along the ridge top if you walk on that trail up there..)
Once you have the list(s) of what you want to see, you can put together a trial itinerary, with options for cloudy days.
Once you are at that stage you can use the timetable yourself. It is kind of silly to waste your time waiting for us to look up things that you can look up quickly and easily yourself, don't you think?
The timetable defaults to the fastest route, which is why you can use the "via" box to redirect the route.