It is never stated his length of life only that following his oath to change his ways he was to keep Christmas in every way ever since
For scrooge to see what effects his lonely past live was to have on his future
Scrooge's partner, Marley, was dragging long chains with him as his punishment for being so evil throughout his life.
In total the three Ghosts (plus Marley) visited Scrooge all in one night
At the end of the book Dickens states that no one keeps Christmas like Scrooge thereafter
No. To quote from the story itself (with respect to Scrooge's lodgings): "It was old enough now, and dreary enough, for no one lived in it but Scrooge, the other rooms being all let out as offices."
So Scrooge will see the life his loyal employee Bob has and how he manages to live on the meager wage he pays
Because that's where he could best accumulate wealth.
To show him how to live Christmas every day and to show Scrooge what was happening in the world around him yet scrooge denied its existence in particular the volume of people that were poor, their treatment and the way they were trying to survive
He lived in the Victorian era and the story was set in 1843
A street adress is the adress/location in which a person can be found.
It was originally Jacobs home but Scrooge took it after his death. No one wanted to be with Scrooge and he lived a miserly life with no one to think of or care for him. He had driven people away from him that tried to care for him. However the house was turned in to offices which Scrooge rented out keeping only an apartment for himself.
The ghost takes Scrooge to re-live specific times of Scrooge's own past life and allows him to see the good and the bad of that life and to understand that these events are what made him and that he can not changes these now but he can make changes for the future