Depending on how "very little money" you have. Maintenance bits first and then let the customisation begin.
1. Suspension is worthwhile but is expensive so if its a stretch I would leave this for another time. If not then bilstein/eibach is what I would sway towards as thats what im going for on my 147.
2. Really depends on what you want, Wizard would be my choice but as your on the other side I would say go custom.
3. Personally I would go for a panel replacement, or just get the stock air filter and replace more often. Not much wrong with it anyway. Drill some holes if you want more noise
4. Theres is a sticky in the ICE section from shiny.. gives you advice on what you need etc. Thats what I followed and worked a treat.
5. As said above, you may aswell do the cambelt aswell if your going for a new variator. This does cost a bit but is an essential so will need to be done sooner or later.
Good luck with the mods and keep us updated with some pics
I'd have said exactly as above...
Parts for the car in Australia are prohibitively expensive.. so try overseas.
EB Spares is a great place to start, they're in the UK... Alfa Romeo Parts and Alfa Romeo Spares from EB Spares - Specialist Alfa Parts Dealers
You'll pay about a third of the price you'd pay here.
Another mob to look at is Alfisti.net especially for suspension... the Eiback / Bilstein (B8 or B6) set up is one of the best.. Eibach "Pro Kit Springs" (they give you a 30mm drop) are absolutely the best springs but you can match them to koni's too. (Sport or FSD)
They also sell coil overs, but you may find them too hard.. personal preference I guess. Mind you, it will be cheaper having coil overs installed as they go in as one unit. Seperate springs and dampers will cost double to fit, but are less expensive to buy. Most go for the springs and dampers because for these cars that seems to work the best.
They have a kit, which isnt too expensive - Alfa Romeo Shop - Tuning, Styling, Fanartikel und Modellautos - Eibach ProSystem Fahrwerk Eibach ProSystem Fahrwerk 43713 / 43714
That price includes VAT tax which is 20%, so subtract that as we don't pay VAT. If you register on the site and log in, the quoted prices will be ex VAT, also keep in mind that any purchase over $1000 will attract GST, so try to keep it under or split your orders up...
IN regards to the variator, if its noisy it needs replacement, but it wont do any harm. I'd wait till you do your cam belt and get a variator kit installed then, but cheaper and very effective.
Hope this helps.