Is Hell now blazing and aflame with the souls of the disbelievers therein, or will it be ignited on the Day of Resurrection? And is the torment of the People of Pharaoh mentioned in the Qur'an by their being exposed to the fire of Hell, or another fire?

Hellfire exists now, and the proof for this is from the Quran: Allah Almighty's saying about Pharaoh and his people: (The Fire, they are exposed to it morning and evening. And on the Day the Hour is established [it will be said], "Admit the people of Pharaoh to the severest punishment.") And from the Sunnah (definition): The Prophet's vision of Amr ibn Luhayy in the Fire, and his saying: "I looked into the Fire and saw that most of its inhabitants were women," and the hadith (definition): "When Allah created the Fire, He said to Jibril: 'Go and look at it.'"