I believe it's not stated
Yes, Snape went to the Potter's home in Godric's Hollow to find both Lily and James dead, but not Harry.
his aunt and uncle and cosin who were all jerks to him
We don't know for sure but it is probably somewhere near Tonks' mother because that is where Harry's godson, Teddy Lupin, lives and Harry says he comes to dinner a lot.
A woman and a man (possibly a bald one).
hermione granger
Bathilda Bagshot She's the author of a History of magic and quite dead by the time Harry and Hermione visit Godric's Hollow.
They appear as themselves and Harry briefly explains that he didn't want to use Polyjuice Potion.
yes and that is were they were killed also.
Harry Potter was not born in Japan but in Godrics hollow
I believe it's not stated
in deathly hallows the gravestone in godrics hollow says 1981
Harry's wand was blown in two, by Hermione Granger. They are just escaping from Bathilda Bagshot's house in Godric's Hollow, when Hermione sends off a curse that rebounds and ends up hitting Harry Potter's wand. He later fixes the wand with the Elder Wand.
All the graffiti appears at his touch wishing him luck and encouraging him.
Yes, Snape went to the Potter's home in Godric's Hollow to find both Lily and James dead, but not Harry.
his aunt and uncle and cosin who were all jerks to him
Well they fly from Godrics hollow to Little whinging, Surrey. But in the book hagrid comments that "he fell asleep as we was flyin over Bristol"