Only one of the Weasley's died during the series, Fred. He was killed when a wall collapsed on him. The rest of the family all survived the series and it isn't known how they died.
Fred Weasley and George Weasley
Mr. Weasley asked the boys and I quote "How was it?" in a kind of happy and exciting matter.
No, only Fred Weasley died.
No, both Mr and Mrs Weasley survive.
Lucas Weasley is not a character in Harry Potter. The only member of the Weasley family to die throughout the series was Fred Weasley, one of Ron's elder brothers and the twin of George Weasley. He died during the final battle when a wall collapsed.
Yes, Fred Weasley died.
No, but Fred Weasley dies.
No
Very sadly yes Fred Weasley dies.
As of Deathly Hallows, George Weasley is still alive and canonically not dead.
Mr. Weasly's Car. It flew the boys to school.
No he does not, but he looses his ear from Severus Snape cursing it off. **SPOILER** George Weasley doesn't die, but his twin brother, Fred Weasley, dies from an explosion during the battle of Hogwarts.