osaka - Takayama

Dear Daniel San,

Hi Daniel San, I'm Christie from Indonesia and this is the first time I join your forum. I'm going to ask your advice about my itinerary. I'm going to go to Japan on March 26,2016 - April 06,2016. I hope it will be the time for cherry blossom. ;)
Hereby my itinerary :

26 - arrived in Osaka at 21.00pm (I hope I still be able to use the train)
27 - Osaka
28 - Osaka - Kyoto
29 - Kyoto
30 - Kyoto - Takayama
31 - Takayama - Shirakawa - Takayama
01 - Leaving Takayama in the morning and go to Mt. Fuji
02 - Mt. Fuji - Tokyo
and I will spend the rest of our days in Tokyo.

Please give me your advice:
1. Is Takayama Hokuriko Pass suitable for me instead of JR Pass 7 days?
2. Because I will arrive at 21.00, I think I will use the Takayama Pass on March 27, so I can use it to Shirakawa Go by Nohi Bus, what do you think about that (I need your advice).
3. From Takayama, what should I do to get Mt.Fuji and Tokyo?
4. Perhaps you have another cheapest advice, please kindly tell me.

Thank you very much for your kindly help Daniel-San!