One thing we have to understand about the research and development system, is that no matter what we want to invent, we would need the devs to implement it. So without the input of the dev, despite we all have a clear vision on what we want to create, we still would not be able to make it.
This ensures the game world is consistent with its theme and limit the impact of historical information in Elyria. Other than that, here's my answer to your questions:
1) Mechanism on currency / international trade are still not finalised.
2) No one can expect how a 21st century person will act in medieval time, nor will Elyria mirror all aspects of medieval life. Therefore, I don't think it is possible to give you a proper answer. For your concern on technology, please refer to the first paragraph.
3) Information in your context aren't protected. Logistics though will still play a part as survival elements and distance wil both play a role in game. We have no clue how big of a challenge they will pose until we enter the balancing phase of development. For now, just assume they will be strong enough to make you stop and think.
In short, you can report where the target is, but you would still need to get there.
4) Please refer to first paragraph.
5) Please elaborate on this. Never should anyone be able to prevent a war on his/her own. A war should always be a group effort.