Hi Mate, Welcome aboard!
More than happy to help where possible mate, you might have trouble with the choke lever from the air filter, as that is quite a rare part, however, Ebay has them every now and then, and I can check with a few sources, and see what I cant find for you.
If you could list any parts you need, or concerns/issues you are having, there are many here who can help.
The manuals section has parts lists, dating guides and repair manuals that can help you here, and if anything is missing from the section that you need, just let ma know, and I will pop it up.
Any Gregory's manual for Victa engines will cover your engine (excluding the later manuals for multiple manufacturers, just look for the ones that are just Victa)
The mower itself is a Model 5, series 2 I believe, it still has the slot for the never released edger attachment, but the extensions on the front for the model 4 flaps are not there.
I believe this one is 1957-1959, but someone here may be able to pin that down more for you.
The original colour is generally accepted as Avocado Green hammer-tone, however I believe this s because that was the colour used by Victa HQ, in reality, many shops selling these at the time assembled and painted them in store, and the colours used varied from store to store, so there s variation, even back in the beginning.
The carby is a Victa 3f, any parts needed for this, I can get you, gasket set for this mower are available here, in the online store.
your starter has me interested, as i believe that one was from an earlier model, however i could be mistaken.
Also, you will wan t to change the blades, as from what i can see, those are actually later blades, and will eventually cause a groove to be cut in the underside of the base (if they have not already)
The badge pops up ever now and then on ebay, but be careful of reproductions, not that it's an issue if you don't mind, but f you are unsure, let us know first, just to make sure you are not paying original price for a reproduction.
You have a head start on many collectors with the toe ring, that in itself is a hard part to find.
Anyway, good luck with the rest of your restore, and as I said, please list any parts or advice you need, and we will do or best!
P.S: if the round muffler plate from underneath the base had any light coloured fibrous material inside it, get rid of it careful and fast, they used to use asbestos for that!!!