Yes, its downloadable content for the full game.
Dawnguard is basically an expansion pack for skyrim. like all expansion packs, it requires the base game to play. So on a PC (and any other gaming device) you need skyrim first and then you can install dawnguard.
yes
No, it is paid-for DLC.
It is daedric armour!
It costs £12.99
It's skyrim dawnguard expansion at GameStop it's a expansion pack for bethesdas game skyrim and currently only available for Xbox 360
Skyrim for Pimps - 2011 Dawnguard Begins 3-1 was released on: USA: 1 August 2012
Skyrim DLC for PC is out as of 8/2/2012 in the Steam Store.
No you cannot. The Dawnguard DLC doesn't gives you that option. But you can look up mods that will bring this to the game.
By purchasing it and installing. Different consoles have different methods.
February 26th 2013.
Dawnguard is the expansion that adds the werewolf perk tree, without that, you can't get werewolf perks.