Wherever you want - if your reputation is highest with the Blood Elves (Silvermoon City) then go there but if you have more rep with another group you can get your mount cheaper there. To get a mount from somewhere other than you "birthplace" your rep has to be exalted; in you own it need only be friendly.
If you are looking for your race mount you can purchase that right by Silvermoon
The same way every other race gets theirs, you buy them when you get exalted with whatever faction you are trying to buy a mount from.
Camels.
Any Night Elf that reaches level 20 can learn to ride in Darnassus and buy one of the cat mounts. To learn to ride the mounts of another faction, you first have to become of Exalted reputation with that faction.
mounts are purely aesthetic, all epic ground mounts will increase your speed by 100%. there is no best. pick what you like the look of
A Horde night elf.
"the Wood Elf", or if you like Warcraft, "the Night Elf"
Yes you can play a Night Elf on WoW. Also Night Elves are Alliance.
The Elf on the Shelf toy is typically placed in a different location each day by an adult or parent. The illusion of the elf moving around at night is part of the story and tradition created by the adults in the household.
Now and then Blizzard places an NPC Night Elf Mohawk in game who sells Mohawk Grenades. Anyone who is hit by them will have the face of the Night Elf Mohawk in the commercials. However, the closest thing to a Night Elf Mohawk is a Night Elf character with the single-ridge of hair in their hairstyle, which is not very impressive.
Yes, the Night Elf race is an Alliance race. You do not need Burning Crusade to be a Night Elf. It is included with the "vanilla" version of World of Warcraft.
brownie elf
go clubbing
The elf on the shelf tradition starts by a family "adopting" this kit from a store. The family then reads the book that comes with it, gives the elf a name, and every night hides it somewhere different for the children or child to wake up too.
You can find your Elf on the Shelf usually hiding around your house in different spots each day leading up to Christmas. It is often recommended to have the elf move to a new spot every night for children to find in the morning.