Sep 28, 2017 - 2:34 AM
in reply to Debashree
Hi Debashree, and welcome to MySwissAlps!
It's not clear to me whether you intend to stay in Zürich for the whole 5 days and do day trips, or whether you can stay elsewhere to reduce travel times to places of interest, so I will assume you can stay anywhere: in which case I would consider spending half your time in Lucern/Luzern and half your time in the Jungfrau Region (mountain villages of Grindelwald, Wengen, Mürren, Lauterbrunnen). You could also stay in Interlaken, but it's much less scenic than the mountain villages.
The Swiss Travel System of trains, buses, boats and cable cars is very dense, and services are well coordinated, frequent and reliable, so it will be very easy to get around.
Here are some links that will assist you to get started with your planning:
Feel free to come back with more specific questions as your planning progresses.