Am an indian and travelling to Hong Kong as Tourist less than 10 days

Hi, am travelling from India to Hong Kong for less than 10 days.
I have my Air ticket to and return ready and stay tickets are ready except the night that i reach HK.

My query is,

how much money should i carry if my travel is less than 10 days as a tourist? ( Pls answer for this )
Am planning to stay in my friend's house on the day i reach HK. For this, should i show any of my friend docs ?