No.
No.
you can get it from npc villages. here is a seed for a npc village: FINAL
Because the current version of Minecraft on the Xbox 360 is not as up-to-date as the PC, the trading feature with an NPC villager does not exist. When Minecraft updates to that specific version, NPC villagers will be able to be traded with.
You can't.
You build your own house and you can find NPC villages in the world
Every map has them, as they are randomly generated.
There are no cities in Minecraft as of yet, only NPC villages which spawn naturally in the game world; cities must be built by the player(s) of Minecraft.
An NPC village really has no useful purpose. It is mainly for looks and so you can interact in fun ways with the NPCs, such as using them to trigger and/or test traps.
With default generation, NPC villages can range from 7 buildings, to 26 buildings. The mean tends to be around 13 various buildings.
Just look around. They randomly generate, so there is no definite location.
Minecraft, we Minecraft players are a whole lot nerdier than MapleStory players. Just lookout for people who play both :)