Rey was a human female scavenger and Force prodigy who discovered her latent Force-sensitivity while on a journey to find the legendary Jedi Master Luke Skywalker and bring a new hope to a galaxy on the brink of war.
We don't know yet. It's a mystery.
Target, Walmart or you might have to order it online
No. He wasn't in A New Hope and while a snippet of his voice is heard in The Force Awakens during Rey's force dream, he does not appear.
No. The new Sith Lord in The Force Awakens is Kylo Ren
no
Palpatine was born 82 years before "A New Hope" took place and (the redeemed) Anakin killed Palpatine in "Return of the Jedi" (which took place 4 years after "A New Hope"). So Palpatine was in his late 60's by the time of the Clone Wars and was 86 years old when he died.
NO
No, of course not.
No. The Force Awakens takes place 30 years after Return of the Jedi
The Force Awakens
No. In the Star Wars Universe Yoda's (and everyone like him) are members of what is called the Unknown Race because no one knows where they came from or really anything about them at all.
In the [now non-canon] books, he sacrificed his life to save Han & Leia's son named Anakin. In the films, he went with Rey to the planet where Luke retired to and helped destroy the fighters on the salt flats outside the rebel base.