Are Ferrets Okay for Teenagers?

I adore ferrets and would very much like to get one for myself and I have a few questions.
1)How much would they cost -canadian currency-
2)Should I get two so it doesn’t get lonely?
3)Do I walk them outside -on my lawn- or inside?
4) Do they walk and play well on hardwood?
5)What are some essential items-other than food and water dishes and litter box etc.-
6)Would they bite me even if I didn’t do anything wrong?
7)How long do they live for?

thanks

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