Looks like colorbond or scyon wall cladding, concrete render painted white/off white and 'apollo' bricks by boral.

You are asking Houzzers to do too much research. Post images of the colours and bricks etc and you are sure to get comments.

The silver will look quite good with your colour scheme. I would probably change some weatherboard for Scyon Axon just to change it up a bit. Also use Scyon Axent for architraves and wall corners. Don't forget eaves and veranda ceilings, etc. as a really nice looking feature use HardieGroove or maybe even some timber to break up the acres of painted surfaces.

cladding over brick creates challenges around windows and doors so unless there's a structural problem with the bricks and they have to be covered over i suggest that painting the bricks would complement the cottage look and be much easier and cheaper than more cladding although another option could be to paint the bricks and reclad the garage with smooth cladding and i wonder if painting the garage a darker colour and the house a lighter shade of the same colour would also help balance the look of the different walls