when will the masternode or supernode start? and whats the minimum ESS tokens will be required?
Probably after maiinet launch which planned for Q4 2018. For masternode needed 100k ESS tokens as I know. With this price its not much (just around 500 usd worth)
That's right, masternode and supernodes are set for launch in Q4 of this year. Additional details will be released with regards to them closer to when they get released. It has been stated that masternodes will require 100,000 ESS tokens.
https://essentia.one/#masternodes