British English Help!!!

[J-P]

What on earth is an "off-license" ???
Iron Monger?
green grocer??? Is there a black grocer? or a purple grocer?
I understand a "chemist" sell medicine.. but he doesn't make it.. he only distributes it....
This is wacky stuff for me.....

[Tdol]

An off-licence is a shop selling alcohol. The reason for the name is that pubs and bars have an on-licence, which means that the alcohol sold is to be drunk in the place, but the off-licence means that the alcohol is for consumption off the premises.
Ironmonger- sells stuff for DIY jobs around the house. It's not used that much anymore. 'monger' means somone who sells something, like 'fishmonger'.
Greengrocer- sells fruit and vegetables. No other grocer by colour that I know of.
Wacky stuff- we have lots of that.