<<"The hardest part of planning is trying to group what is possible to see in 1 Day. Do you have any List of Possible Places that can be Seen/Visited in 1 Day? If yes then I can Build my daily Plan>">>
Your overall plan that you laid out in your first post is mostly reasonable, and allows enough time in different places to enjoy them .
One possible exception - your first day:
<<"We are Taking a Train From Vareena to Tirano then Taking the Local Trainfrom Tirano to Chur. Then Chur to Zurich.We are spending 1 day in Zurich">>
I do not understand "Vareena." The closest that the timetable comes to that name is Varena in Lithuania, and that is an 18 hour train ride from Tirano.
If you mean the Vereina Tunnel, one end is at Klosters and the other is near Susch in the Engadine.
From Susch to Tirano and return to Chur takes 7 to 9 hours, and covers a lot of the same tracks twice. From Chur to Zürich takes another 1 1/4 to 1 1/2 hours.
If that is your intent, you have to get to Susch to start the trip.
I suspect a misspelling of "Vareena."
For planning the travel times, including those within the Jungfrau Region, such as from Lauterbrunnen - not Lauternbrunnen - you have spelled it both ways ;-) - to Jungfraujoch or Schilthorn, or for planning trips by boat/train/bus/cable car near Luzern, to the Rigi or Pilatus or Titlis, the time table and a map are pretty much a necessity.
Same for travel from Luzern to to Lauterbrunnen.
Use the timetable at the SBB website-
(which takes you to the main SBB rail website, where you may choose Italian if you like)
or,use the direct link in this website -
which takes you directly to the timetable, and gives some instructions on how to use it.
There is a special map for Switzerland, with lots of useful options in the menus, and which gives more of those optional details focused on Switzerland than does Google Maps. Sometimes I use both, particularly if I am coming from outside Switzerland
If you use the links to city or regional information that Arno or Annika provided, in this "My Swiss Alps Website"
that will give you some ideas about what to do at a particular place. There are always many more than you can do in one or two days. Too prepare a list of what can be done in one day is not really possible, because at each of the places you have named, there are dozens of places to go to or things to see, all within a varying distances (and times) from any one location.
Here is one example of the hundreds of things in the Jungfrau region,some of which cannot be done in the Low Seasons, or in the heavy snows of the winter seasons.:
You can also get information from :
Once you have picked some things that interest you, check the map and the timetable. Allow time for a meal or a coffee or sightseeing, as you wish. As Annika has pointed out...that varies a lot by individual preferences.
If you ask - "Can I see which mountains can visit in one day - the Rigi, Pilatus, Titlis ? "
even that is hard to pin down because there are faster train routes to the top of the Rigi from Luzern via Arth Goldau, or slower routes with different scenery by boat to Vitznau then rail to the top.....etc. At least, that can be answered, however. An answer is "Any two if you rush, but you may not have time to enjoy the locations."
At the end of April, hiking in the higher altitudes near the Jungfrau will be difficult since snow will block many trails. Some of the hotels and and cable cars may be closed for lack of customers....that is "Low Season" in the high alps. Between ski season and Summer season.
Have fun planning.