All who can answer, though mostly pertaining to Christian or Christian-type religions
Do you believe Satan is the Lord of Hell/Ruler or an entity that is there for punishment, just like the humans who are supposed to be sent there? (I think I remember reading somewhere that Satan and the demons are in just as much torment and hate hell just as much as any human sent there, or something to that effect.)
Not really sure. What I can extrapolate from the Bible, is that Lucifer[I'll call him "Lucy" for short] wanted mankind to be able to perceive good and evil. God wanted them to be ignorant, because They knew that, given knowledge of good and evil, they could choose evil, which was bad. After the whole Garden debacle, Lucy was stripped of his wings[Dragon turned to serpent] and cast down. Not really sure what canonically hapens afterwards. The Bible describes Lucy a fair bit less then the actual Church does[See "Shitty fanfics, above"]. In any case, according to Revelation[Questionable canon, please take with 1/12th of a saltshaker], Lucy would be cast into Hell[Described as a pit of burning brimstone] for eternity at the same time as everyone else at the Last Judgement. Not ruling it. IN it.
Who betrayed Jesus and why?
Judas, for monetary gain, as far as I know. He supposedly later crucified himself later in penance.
What is your vision of heaven?
This isWhat's the deal with Original Sin?
Original Sin is knowledge of good and evil or the ability to sin. I suppose you could also call it sapience. The ability to, with full knowledge of the wrongfulness of your actions, commit wrongdoing. This is the cutoff between person and animal. An animal who kills a person has no idea that what they did was wrong. A person who kills a person KNOWINGLY is guilty of sin. Not sure where some of the smarter monkeys fit into this, as their exact level of sentience is tricky to determine.
FAKEEDIT: Iminent Cryxis pile detected. Please don't.