In my last house, after adding a living room (the area you see this side of the arch) and also updating bathroom etc I couldn't afford to reline the ancient walls in my little lounge (when I removed the purple wallpaper I found a mixmax of boards, gib, pinex, plywood and holes!) so I plastered walls all over with layers and layers of newspaper and wallpaper paste (papier mache), then after applying primer/undercoat I painted with 2 similar colours (rich reds in this case), and stippled the surface with a plastic bag. This made it look just very slightly textured like leather and successfully disguised the uneven surfaces. Gallons of gap filler filled the gaps between the old T&G ceiling boards and evened out the mismatched skirting and scotia. Again white paint on all the trims. Amazing what can be done when you have to make do! This was a great cosy little room! (Before photo is the 3rd one)

This is a rental property I am currently renovating. I am not painting or rendering the brick but rather looking for some trim & guttering colours to give the front a bit more street appeal. Thanks.

Unfortunately white is not just white any-more there are so many whites. As the grey you have selected is a "medium" grey not to light / not too dark. I would go for a crisp clean white. I don't have any names but I would not go for a white with any slight tinting. Make both colours strong in their own right.

To bring rhythm and flow with the house I would continue to use the monument on the garage door to bring connection of the deck with the house. Use the same for the baton on the deck. If doing the roof look to a similar colour as monument or in fact the same. Perhaps look at Half or Quarter monument for the concrete steps up to the front door. Paint your front door a colour to draw the eye..perhaps a dark, mid blue. The guttering looks in good condition but I would paint that the same as the roof including the downpipes. Go for a standard white under the eaves. I feel like you need something to the left of the garage to balance things out for street appeal. Greenery planted to hide the gap up to bottom of deck but planted towards the street to allow a meter gap to walk through from left of garage.