[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 )?
yes most of us cant afford to give them 24hrs but we do give them afew hrs of aircon esp durin hot afternoon. havin ceramic hidin house n cooling plate will help alittle. but i still feel its a must to give aircon during hotter mths. there r pple who dun keep chins in aircon but got to be caution of heatstroke.

[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... =/
they need daily out-of-cage time. areas should be chin-proof as they like to chew on anything n everything. i dun let them run ard in my whole room but i fence up part of it as their playin area. if u let them out everyday at the same time.... still to the same routine. they will noe they its their play time n when they have to go back to their cage. chins r smart.

[3] Can they stand little bit of noise? Like TV's? 'Cos from wat i've read, they hv a really really quiet enviornment?
i read from chin.com, many hobbyist who have rehomed chins actually let them watch tv. but of cos during their awake hrs. they need a quiet environment in the day. a noisy environment will give them stress. one of my boy will sit on my lap n watch tv with me every night.