I would start with making a decision on the carport first. Start by talking to the council as you may not be able to do a double carport (and the single carport at your neighbours looks like a tight squeeze!) Also as Missmel said you should probably also make a decision whether to paint or not early on. If you are going to go with carport, paint, new awning and possibly porch windows you are getting into a whole new look so I would start talking a professional about the best way to design it. As an alternative to the porch enclosure could you get the front windows double glazed to reduce noise? If it was my place I think I would only be changing the awning, paint the fences, landscape, and maybe do a single carport if its really needed (plus the tiling etc that you mentioned). Some new fretwork might be nice too. To me the main thing to change is the bullnose, as you said its not original and it looks heavy and dominating. You will have to post some pics when done I will be really interested to see how this all turns out.

The whole place has that 'of a certain period' look , but I suspect it can be done . The 'reverse' side of the bench in pic 1 has to go -- it looks cheap veneer that has overstayed its welcome ! Black or white gloss Formica or similar would lift that . The lino would need be modernised -- maybe tiles , maybe just 50 year newer lino , or wood planks would look mutual and modern , and reference the benchtop too . The wall tiles ditto -- remove and replace . Gloss white or black or charcoal . Or a colourful splashback , either the full width or maybe as a centrepiece 1.5-2 metres long , in a red or green or yellow or similar . Above that paint in ( I shiver as I write this ) grey . Maybe a 'frieze' of contrasting but complementary subway tiles , attached vertically to add some bulk . Ordinarily , I'd suggest cupboards or even shelves or a display cabinet above that , but anything added would look so out of place it would be hard to pull off , unless you matched the timber benchtop , and that would be difficult . And presumably change the cupboard handles -- a trendier stainless or chrome design would tie in with the sink unit .

your house looks like an 80's home with a sunken lounge. I live in an 80's single level house like yours and love the spacious feeling, do you have raked ceilings? If it was me I would make small changes so suggest the following, 1) If the eave is deep enough I would push your sons bedroom wall out this would give him a good sized bedroom with access to the next bedroom and bathroom for his "PAD" 2) There is a flow problem with the house with accessing the bedrooms as you have to step down into and back up from the family/rumpus/living at two points. Keeping the "fireplace" insitu I would take part of the internal bedroom to allow for a passage across from the entrance to the bedroom wing. the reduced bedroom would make a great study or guest room. you can keep both step down points or close off the wall from the fireplace to the master bedroom 3) another problem with the house is internal access to the alfresco, at the moment it would only be via the family/rumpus or master bedroom, I suggest that the alfresco decking be split level to allow for large sliding doors coming off the new open plan kitchen. The door into the existing kitchen be kept but remove the laundry which will allow for a bigger dining table. 4) The laundry could be moved into the planned office/guest.pool room which would be perfect if there was access down the L/H side of the house for hubbie coming home and needing a cleanup which would be done in the same space, which could also be his man cave!! 5) The granny flat needs to be sorted by a local designer to get the best possible result, I have heard that a studio is more readily approved over a granny flat (siriuskey)

This isn't a personal recommendation as I have not yet purchased anything from this company, but I've been admiring the timber floating shelves on their website. https://shelvingshop.com.au/product-category/floating-shelves/wood-effect-finish/ Or you can buy the brackets and have the shelf custom made in whatever material and size you want. https://shelvingshop.com.au/product-category/brackets-2/floating-shelving-brackets/  I think hardware stores also sell brackets by themselves. I was thinking of going the custom route because that means I can ensure the brackets will be attached to the studs. I believe you can paint melamine after proper preparation of the surface, but I doubt if you can stain it.