I have a 2011 Countryman S and love it. I can't answer your first question, I don't know the answer; but, my gut tells me "No", just calls.
The "S" bumper is an exact match for the base model. The JCW is also; but, is very expensive relatively speaking.
The headlight are swappable; but, now you're really talking money, in addition to the lights, you'll also need the ballasts and igniters. I'd do additional rally lights instead for about 1/2 the cost; depending on whether you're using new or used parts, doing it yourself or having the dealer or a private garage do it.
With 120 HP, I wouldn't make it too racy looking. A nice aftermarket exhaust system.