Dark magician is only in the packs LOB, DB1, FL1, SYE, SD6, PYC, RP01, DLG1 and DYPG.
Dark magician girl can be found in the millennium eye booster pack.
Dark Magician Girl can be obtained in the following sets:Collectors Tins Promos: Series 2Magician's ForceRise of Destiny: Special EditionDuelist Pack: Yugi
There is no BTT. Maybe BPT-001, which is the very first of the Booster Pack Tin promos.
In general, no. There is a difference between the terms "Dark Magician" and "a Dark Magician monster". The first means a card called, and only called, "Dark Magician", while the second means any monster with 'Dark Magician' in the name, including 'Dark Magician Girl'. That means 'Dark Magician Girl', or 'Skilled Dark Magician', etc, are unable to use most Dark Magician support cards - you can't summon them using Dark Magic Curtain, they won't let you activate 'Dark Magic Attack', etc.
Magician of Black Chaos is in Premium Pack 1.
If you mean in booster packs and such, LOB, DB1, FL1, SYE, SD6, PYC, RP01, DLG1 and DYPG.
She was recently re-released in Duelist Pack Yugi, as a super rare.
1/23 packs
They're not quite true booster packs but Dark End Dragon could be found in Legendary Collection 2 Mega-Packs and Ra Yellow Mega-Packs.
Dark magician girl can be found in the millennium eye booster pack.
Dark Magician Girl can be obtained in the following sets:Collectors Tins Promos: Series 2Magician's ForceRise of Destiny: Special EditionDuelist Pack: Yugi
The Exodia cards can be found in the booster packs Legend of the White Dragon and Dark Beginning 1.
"Metal Raiders", "Dark Beginning vol. 2", "Gold Series 2" and "Turbo Pack 6" are the booster packs that contained "Sangan". In the United States, it was also in the "Dark Legends" booster pack, and in Europe, "Sangan" was in the booster pack "Retro Pack 1".
Draining Shield can be found in the booster packs Ancient Sanctuary, and Dark Revelation: Volume 2.
It comes in packs of Cybernetic Revolution, and Dark Revelation 4.
You can get it in packs of Metal Raiders, and Dark Beginnings 2.
"Uria, Lord of Searing Flames" is in the booster packs Shadow of Infinity and Dark Revelation Volume 4.