How many TRX do we need to run
No idea, that's what i'm trying to find out also. I looked on there website, searched the net for more information about it but just can't find anything about it.
I have done some researches and until the official launch of the masternode (in 31 May) you can setup a node in the test-net.
Here there are some instructions:
https://www.reddit.com/r/tronsupport/comments/8beglx/witness_node_for_newbies/?st=jg0rxolq&sh=794d4193https://www.reddit.com/r/Tronix/comments/88isy4/how_to_set_up_a_tron_testnet_node_on_google_cloud/?st=jg0s0uab&sh=c0209317Regarding the reward system, in the test-net I don't think you will get any rewards. You have to wait the official launch of the masternode and then your node has to be voted as Superdelegate.
Then you could earn 32 TRX per block validated, I think. According to some rumors, you should be able to validate a block on every 3 seconds!!
It’s exactly like mining Bitcoin. Except instead of buying or having computers, you just use your personal stash to stake. That is proof of stake vs Bitcoin proof of work.
So you make money by validating transactions and hopefully getting the block reward or a portion of it if you join a staking pool.
Again same concept as Bitcoin Mining I think.