1) a computer with an okay cpu/ram / a bot client
2) free scripts are all available when you load osbot i believe, premium ones you have to buy and local ones you have to dl yourself
3) i think you mean local v sdn? sdn are ones approved to be on the repository and fit for use so to speak which you can easily reach, locals are ones you have to dl yourself
4) mirror mode is a new mode where the osbot client attaches itself to a standard rs client, but you can't run it on linux/mac and you need a pretty good cpu/ram