Inherited a Mini R56 - help needed :)

Hi everyone, I inherited a 2008 Mini Cooper 1.6D recently. Despite it's age it only has 40k miles on the clock, and has done about 200 miles a year for the last decade!

There's some things I've noticed on it which I wondered if anyone could help with. First is the radio - I wasn't expecting it to but it doesn't have DAB. I think it was an option, is it a big pain to swap out the radio for another mini one with DAB? The second issue is pushing the air con button does nothing at all. Could it be a regas needed or something more serious like the compressor? Another smaller issue is the interior chrome door and gloves box button etc is worn and dull, as well as the fan control, can these be replaced?

Thanks in advance!