Yes
No, the 'furniture mod' does not have any server based files available so it is impossible to host a server with this mod on.
you can have many mod but say if you have the mc donalds mod installed then you try jammy furniture with it it will crash and minecraft will force close
There is a pumpkin carving mod, as well as many different furniture mods. If you go to the Mineplex server on your Minecraft, then you can play a game called draw my thing which is about art.
Check with a server mod or server owner about the faction mod he/she uses
Possibly your own server.
There are no friend requests in Minecraft unless the server you are on has a specific mod for it. If so, ask around the server for specific instructions.
Yes Or any other server mod(canary,hMod etc.)
It depends on the Minecraft server and what plugin the server is using for factions, sometimes typing "/help" on a server will give you the command syntax (what is required for each command). Alternatively if you know what mod they use, Google search for the plugin/mod and find out.
it is possible by modifying the server.jar file with the modded class files from the mod download.
yes, ive found a couple but theyre inactive
delete a mod maybe and force the update?
It depends on the mod. If the server is using something like a world changing mod, say like, "Better then Wolves" mod then yes every one needs it. If your using something like an individual mod like the compass mod "Rei's Mini Map" then no one needs it to connect to your server.