Mine are inside on bad days and outside on nice days, they wouldn't really do well in a flat. There are some species that come from more tropical climates that may do better in doors, I am afraid that I don't know much about them though, it might be worth asking on shelled warriors forum, I'm sure someone there could help
As for being wild caught 3 of mine are UK captive bred, very placid, friendly and generally not spooked! the other was a rehome probably originally wild caught as she was nervous and hissy when she came to me, she is just as friendly as the others now though
With tortoises it is best to avoid pet shops and go to reputable breeders or rescues