Australia has nice examples of painted and rendered Art Deco homes. If it was a different kind of brick I would say keep it, but I think painting/rendering would really brighten the place. I love the windows. Although all pics here don't exactly match your style, they are all of that era. As mentioned in above comments, there are mix of landscaping styles that suit from conifer/gravel/grass to cottage rose garden to an Australian native garden. Do what reflects you and how much time you have for your garden.

Terracotta roof tiles. Then you could either go with steel greys and blues, varying shades and tones of terracotta or a combination of both. Have included some Dulux colours showing how versatile terracotta can be to perhaps give you some inspiration...

colours are so personal and look different in different light and what looks perfect in my cold climate may look washed out in Queensland...i suggest you check with the colour advice services available with most major paint companies..the service available locally has a fee that is refundable as a discount with the purchase of paint..having suggested a professional my amateur opinion is to leave the original roof alone (clean?) the style and colour of the unusual terracotta tiles add a flavour of Spanish style to the house and is a point of difference with all the other bland roofs.. i think a simple off white like Colorbond Surfmist for the main walls with all the eaves and vertical columns and the beams across the windows in a bright white, with a colour to highlight stone steps (copper?) for the front door, Woodland Grey for the railings and windows and one or two turquoise coloured chairs and a small table on the front terrace

don't paint the bricks or window frames ..check with council to confirm that you can add a pergola or covered verandah across the front including the carport and add the roller door on the outside of the new verandah so that you will have more carport space with a covered walk to the front door (keep in mind that you usually need to retain access for the metre box) add an awning over the front window and use light colours for the roller door, guttering and trim eg similar (not the same) colours to the windows eg Colourbond paperbark? invest in a new security door without the grills and make sure that you offer all the unwanted plants for sale.. you may even find a local nursery could be interested in a swap