Some Questions

Hi guys, a few questions abt hving chins as a pet.
There are some newbie quesions, but i realy liek to clear my doubts before hving one as a pet. =)

[1] Do they really nid to be provided with air-cons?
I've seen some forums saying not a nessaccary thing to do but best provide if possible.
So if i cant provide them, will they be able to survive ( with their thick fur and all )?

[2] Chins nids a huge space to run around, so is it a must to let them roam abt in rooms? Being fast runners and love jumpin around, how will they knw its time to return to their homes(cage)? I mean they wont love to be handled by our hands often so... =/

[3] Can they stand little bit of noise? Like TV's? 'Cos from wat i've read, they hv a really really quiet enviornment?