to stick the ears and the bit on his head - either use the buttercream icing or make up some royal icing to stick them together - the buttercream should be enough, the royal will set like glue so they wont come off.
Im not sure what it is exactly but I've seen cakes with what lookes like roasted, shredded coconut on top, its about the same colour as makka pakka, and I reckon it would look good.
I have got a butter cream icing recipe at home in my Womens Weekly kids cake book I will dig out for you tonight - I just hope I've unpacked that one from the box! As for the caramel flavouring Im not sure, but if you cant get it, I reckon vanilla would be nice.

Not sure about the cake itself, I normally just buy a packet sponge and freeze it - makes the cutting/shaping a lot easier - and put all the flavour in to the icing.


Im trying to remember what his eyes and nose etc look like. Lollies normally work well, licorice, choc buttons etc.