Rubeus Hagrid was in Gryffindor at Hogwarts School of Witchcraft and Wizardry. Hagrid was in the Gryffindor house.
Lucius was in seventh year when Severus started. He was mentioned during Snape's memories in the seventh book. Lucius Malfoy had a prefect badge on and welcomed Snape to Hogwarts. James and Snape were in the same year.
book 7 chapter 31 the battle of hogwarts on page 625
Nobody. Tom Riddle, a.k.a Lord Voldemort, does not love anybody. He is not interested in love, only power.
The death eaters started as a group of followers of Tom Riddle while Tom was still at Hogwarts. They refereed to the group members as Knights of Walpurgis.
Lord Voldemort(Tom Marvolo Riddle) Bellatrix Lestrange Lucius Malfoy Narcissa Malfoy Bartemius Crouch Peter Pettigrew Cornelius Fudge etc.
Tom Riddle Draco Malfoy and othe Slytherin students Lucius Malfoy and other Death-Eaters Severus Snape (arguable) Voldemort Dolores Umbridge (not arguable)
Tom Riddle was possessing Ginny, so while he didn't physically carry her into the Chamber, he did make her go there.
Lucius Malfoy picked up one of Ginny Weasley's books and slipped the diary inside. He then handed both the book and the diary back to her. Lucius Malfoy was not aware that it was a Horcrux, he had been told to keep it safe by Voldemort and simply wanted rid of it before the Ministry found it.
A house elf is only set free when their master gives them a piece of clothing. Harry Potter had tricked Lucius Malfoy into giving Dobby the sock, meaning he released his Dobby from his service.
Tom Marvolo Riddle, and in a way, himself, he must defeat his greed/urge to become master of the 3 Hallows, which they nearly destroy some of his relationships. He is also in reality a living horcuxe, which poses a threat also.
Harry Potter Ron Weasly Dobby Luna Lovegood Hermione Granger Professer Snape Kingley Shackbolt Bill Weasly Molly Weasley Fleur Delicour Alecto Carrow Pius Thickensee Rufus Scrimgeour Lucius Malfoy Draco Malfoy Narsicca Malfoy Ginny Weasley Tom Riddle Ruepus Hagrid Severus Snape Filius Flitwick
Yes.
Yes. They somewhat mention in Harry Potter 4. But they definetly show it in 5 and 6.
draco malfoy's father
Yes. First, it was placed in her bag of books by Lucius Malfoy. She then tried to get rid of it but saw Harry Potter with it. Terrified that Tom Riddle would tell Harry she was behind the attacks she stole it from his dormitory.
Voldemort, Tom Riddle, Lucius Malfoy and Barty Crouch all have dark wizard spell ability, but you'll need Hermione's cat and strength from Hagrid or Krum to complete all the levels. Harry will be needed to fend off Dementors.