A disgraced stunt man and special effects artist named Quentin Beck who donned an extravagant and theatrical costume (notable for its crystal ball like helmet) and sought to discredit and frame Spider-Man using illusions. Mysterio is well known for buying into his own hype, treating every moment as if he is a grand performer on the world's stage. Founding member of the Sinister Six. His student and friend Daniel Berkhart adopted the identity after Quentin Beck's death when he committed suicide when he fought Daredevil. A teleporting mutant named Francis Klum later purchased the Mysterio costume and arsenal from the Kingpin, although he would be later challenged by Berkhart and even Beck himself, who has apparently returned from the dead.
When Spider-Man rid himself of the alien symbiote costume he acquired during the Secret Wars, it bonded with reporter Eddie Brock, who hated Spider-Man for causing him to lose his job and reputation. The symbiote gave Brock all of Spider-Man's powers, and even more dangerously, the knowledge of his secret identity and protection from his Spider-Sense. Venom later spawned an even more dangerous villain, Carnage. After having an epiphany, Eddie Brock auctioned the symbiote to the son of a major crime lord, who unsuccessfully attempted to kill Spider-Man and died.
FOR 4
No Let me take on example from TAS
Venom was winning and because of that Spidy used sonics to force the symbiote from him
When he fought Carnage the first time he was weak because of the sonics used Spidy then got the FF to trap him spidy broke his word to venom he promised to let him go and even disturbed him while he was living in Paradise