aspen bedding , and what is the best food for the baby

Fleece bedding , carefresh and littler which one to use? Do they even use a litter box ?
Is it ok to start out with a huge cage if u get a baby
What is a good bedding easy on allergies for me . Do u know.
Which is better to get 1 or 2 chinchillas?

And what about food . Do u all have recommendations .please help me thanks