You can't.
No You Can't unless you have a mod.
you can't
no. in creative, it is all day, no mobs, flying, and unlimited resources.
You cant
yes and you can saddle it through training it with apples
you cant have a minecraft pocket edition username
Yes there is signs in Minecraft Pocket edition
Its Herobrine and you can't spawn Herobrine in vanilla Minecraft he's a myth.
No, they are no enderman in Pocket Edition of Minecraft 0.8.1
you can't ):
Yes, there are villages in the updated Minecraft Pocket Edition.