All of the servers will be running on Minecraft 1.8.9 (due to the coding being a lot easier, and it generally being a much better version than 1.9+)
This isn't true, except from some of the functions being deprecated.
We will incorporate ZARP VIP into the server in a variety of ways. ZARP VIP will give you access to special cosmetic features in the lobby server (and in future, the minigames servers), and will also have some benefits in other servers. We will have some special kits which will be accessible to VIP members only on the Factions server (still obtainable by normal users, but difficult, so as to conform with the EULA). On Freebuild, we could also raise the plots limit for VIP users, or even add the ability to merge owned plots to create a larger plot (these are only ideas which we could add, no promises that they are what we will add just yet).
This is not allowed and will most likely get the server blacklisted.
We will have a custom booster packs system in place for the server in the future (this will not be in place from the very beginning, as it may take a while for us to set up, and will require us to see what gamemodes players enjoy most for us to decide what options to add to the booster packs). The way that this booster pack system will work is that, much like on SSRP, you will be able to buy booster packs from the ZARP forums. These booster packs will then give you a number of "booster pack points" in game. You will be able to use these booster pack points to purchase different upgrades for your favorite gamemodes. In order to follow the Minecraft EULA, the upgrades will still have to be obtainable (in most cases) by players without paying, but will be rather difficult to obtain. These upgrades could include: mpre plots on Freebuild, money on Factions, weapons or armour on Factions, cosmetics in minigames, etc. If you have any other suggestions, be sure to tell us!
This is still not allowed by the EULA.
You needed to do some more research on the Minecraft EULA, contact me on Steam and I might be able to help you out.