No he starts to spend on himself Tiny Tims medical bills and charities
The way they live, the loving environment, and of course the suffering of Tiny Tim.
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
The he (Scrooge) has little time left to make changes to his life and the way he treats his fellow man. Should he not change then He (Scrooge) will suffer the same fate as Marley; eternal damnation
For scrooge to see what effects his lonely past live was to have on his future
They are one and the same as Scrooge is the central charecter in the story
All the spirits teach scrooge a lesson
Other than knowing it was after Scrooge, we don't have any way of knowing.
To highlight the loyalty of bob to Scrooge and to bring out the feeling of dislike by Bobs family for the way Scrooge treats Bob
Yes they are
He told him to leave his counting house and keep Christmas In his own way as He (Scrooge) would keep it in his.
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."