After defeating Agahnim for the first time, you'll be sent to the Dark World. Remember to get the Moon Pearl in the Tower of Hera, otherwise, you'll be in a bunny form when you enter the Dark World.
No
You need to beat both Link to the Past and Four Sword.
After you get the Ocarina, Link will remember Zelda and she will teach you the Song of Time. You have to play it to start the three days over.
will link and Zelda what? No. The answer is Chuck Norris.
No. Link is reincarnated in every generation, but Zelda is not...if you played Zelda 2 you'll remember that every single female born into the Hylian Royal family is named Zelda after the sleeping one. Also, I don't like the idea of inbreeding.
It returns the player to the light world when they are in the dark world.
No. A Link to the Past is the third installment of the Adventures of Zelda. The first is simply The Adventures of Zelda. The second is Zelda II: The Adventures of Link.
it is in the 4th dungeon in the dark world
Get the Moon Pearl from the Tower of Hera. This will allow you to stay in your normal Link (not Zelda!) form in the Dark World.
Zelda and link ,No, they aren't siblings. but link has a little sister in windwaker
In The Legend of Zelda: Ocarina of Time, Link finds out that Zelda is Sheik, but only towards the very end of the game does Zelda reveal herself to Link.
I haven't played it in a while, but if I remember correctly, you simply buy it at the shop in the main village.