yes
he was not an original avenger
No. He will not be, was not in, the Avengers: Age of Ultron.
Spider-Man officially joins The Avengers in the comics during the "Breakout" story arc in New Avengers #1 (2005). In the Marvel Cinematic Universe, Spider-Man joins The Avengers in "Captain America: Civil War" (2016) and later becomes a more permanent member in "Avengers: Infinity War" (2018) and "Avengers: Endgame" (2019).
In the comic books? Yes. Sometimes. In the movies? Not yet.
I don't think that he ever existed! but if you are talking of the movie... they are making a movie I think in 2012 or this year, and a movie called "the avengers"
Literally everyone in the world is not going to be in Spider-Man 4 since the film Spider-Man 4 does not & will never exist.
no
No one plays him because #1, there was no Avengers film in 2010. Avengers wasn't released until 2012, & #2, Spider-Man wasn't in The Avengers. The only Avengers incarnation that was around in 2010 was the DisneyXD series, Avengers Earth's Mightiest Heroes & Drake Bell voiced Spider-Man but the episode he appeared in wasn't aired until 2012.
No Sony owns him
No.
No Sony owns him
2012- they are going to call it "The Amazing Spider-Man."