<<"@slowpoke: i think on day 1 i only go to luzern and engelberg, Could you tell me which place should i visit?">>
Adding to what Arno has said, I am attaching a screen capture from the timetable for a random day in February.
You did not tell us when you are traveling.......so I chose a date at random.
The timetable computer has selected the fastest route to Engelberg +Luzern. It does NOT go through Montreux , then Zeisimmen, which would be much slower. (In fact, that route through Montreux and Zweisimmen is the western most segment of the Golden Pass Route.)
If you open the timetable and make the entries I have shown, then select a journey and open it, you will get some options at the bottom of that section of the timetable. You can get a map, and also a list of all intermediate stations.
The fastest routing is the one shown, which goes through Bern to Luzern, then to Engelberg, then back to Luzern.
That routing shows that you have 8 minutes in Engelberg. Obviously, you will want to take a later train to Luzern if you spend any time at Engelberg or on Titlis. (Back to Luzern at xx01, 48 minutes to Luzern, runs till 2201, with a couple of later connections by bus.)
Another option could be to stay in Engelberg, although Luzen has a lot more to see and do.
<<"And how to book golden pass route if i want to go to interlaken from lucern. (Sorry i still dont understand)">>
I have attached a screen shot. Make sure you tell the timetable to route through Meiringen or else it might choose a routing that is not on the Golden Pass ( or, same thing, Interlaken-Luzern Express.)
Hope this helps you understand the tricks of using the timetable to determine your routing.
If you use the timetable to understand the trip from Interlaken Ost to Basel via Zermatt, you will see that it sends you from IO to Spiez to Visp to Zermatt. The total trip duration is 5 hrs 59 minutes to Basel, with almost no time in Zermatt..
Since you will want to have a few hours in Zermatt, obviously, you will take a later train to Basel than what I have shown.
The computer uses the fast route from Spiez to Visp through the new lower "basis tunnel" which goes through the mountains well underneath Kandersteg. Not much scenery in a tunnel.
Going toward Zermatt from IO, there is also a very scenic route from Spiez to Visp by way of the older, higher route through Kandersteg, BUT it adds a significant time to the journey.
If you go from Zermatt to Zürich, instead of Basel, that leg of the trip takes almost exactly the same time....about 3 1/4 hours more or less.