New to AoE2, so many Questions

Hey, I started playing this game when it went on the steam sale 2 weeks ago. I learned a lot so far, but there are a few things I couldn't figure out yet.

1. How do I set hotkeys for loom, next age, or the upgrades in the blacksmith? There are so many things I can't find where to set the hotkeys.

2. Is there a way to select all idle villagers?

3. Can I queue attack commands or buildings commands? For Example, I have three knights and I shift-click through a line of enemy villagers so they all attack the first one, then go to the second as soon as they killed the first. Or just give a villager the command to build a house and then shift-queue a command to return to wood after the house is complete

4. How to I play on Voobly? I downloaded the client and installed the Age2HDCompatibilityPatchV5.exe it told me to. I can join lobbies in Voobly but when the game begins it starts in a tiny 640*480 box and everything around it is black.

5. When I have all the expansions and my friend has only the standard HD version. I have a lobby with the expansions. He can join, but can only has a very limited choice of civs. None from the original game. Is this right? I wan to play with my friend against other civs, but we he wants to choice a civ from the original game..

6. I have 4 villagers idle and want to build 4 farms. Is the best way to individually select every villager and give it the command to build a farm? When I select all 4 villagers and build farms they ally start to seed the first farm.