Yamanote line, eletronic ticket gates and others

Greetings,
I'll be travelling to Japan on 27th March and coming back on 6th April.
I'll buy the 7day JR pass, but I have some questions regarding :

-The yamanote line, tokyo monorail and other JR trains/buses: I know the pass covers the yamanote line, the tokyo monorail,the shinkansen hikari and other trains and buses from the JR company, but I really would like to know what's the proccedure to enter the train/ bus? For example, I have the pass, and I want to go from HAMAMATSUCHO station to TOKYO station, with the yamanote line. I just enter the train and show the pass to the person who is selling the tickets? does the same applies to the tokyo monorail and other JR transportations?

-In some stations, there are those electronic ticket gates where you pass your ticket and a ''beep'' sound confirms and opens the passage for you. How does it work with the JR pass? can we use the pass or does it have a different gate we must go to?

Thank you very much!
Lyneais