Hi Leo,

Kindly find my response for your inquiries below:

Hello how do I update the amount of friends to 24 and to display random on community page?

You can adjust the amount by setting (applications>friend: http://take.ms/jbBYR ) I've helped you to change it to display 24.
But unfortunately there is no setting to display it randomly.

How do I update leaderboard & remove ?

You can head to module setting ( extensions>module-EasySocial Leader Board: https://www.screencast.com/t/YXBSLdDNK )