By 'The Hobbit', I'm supposing you mean Bilbo Baggins in The Hobbit? If so, he faced Smaug the Great Dragon, King of the Lonely Mountain.
Sorcerous means 'magical.'
The spiders.
No, there is no indication in The Hobbit that The Ring was malevolent, although it is most definitely magical.
not really, they prefer homes in burrows in the ground.
They don't exist. They are part of the Tolkien mythos.
If you were one you wouldn't have to ask
Griffin.
Sure.
NarwhalDugong
The word is genie, a magical creature.
No, there is no Agrog in The Hobbit or The Lord of the Rings. There is a giant spider named Aragog in Harry Potter and the Chamber of Secrets.
no he killed his mate for a ring