All of this has been covered on the Australian VW history pages here:
http://www.clubvw.org.au/history001
The first VWs brought into Australia were the two 1945 models shipped in by the Army in 1947 (plus a Kubelwagen). They were evaluated by the Army but sold at auction by the Commonwealth Disposals Commission in 1949. As Grahame says above, one has been found and is in Adelaide, the other lost. The Kubel is in the War Memorial collection in Canberra.
The Hanael's 1946 VW was privately imported by Mrs Hanael in 1951, when she was emigrating to Australia to join her husband Ted who had been interred here during the war. They settled in Horsham and used the car for the next 10 years - the first privately-owned VW to drive on Australian roads. VW Australia found them after a 4-month search in 1961 when they were looking for the oldest VW in Australia to celebrate the 100,000th Australian-built VW. At a ceremony at Clayton the Hanaels were given the brand-new 100,000th VW,in exchange for their '46. The '46 was used in VW ads of the time and sat in the Clayton head office for many years. It was shipped to Sydney when LNC Industries gained the Australian VW business in 1968 (when it was damaged, and repainted from black to light grey/blue). It was sold in the early 1980s, went on display at Greens Motorcade in Leppington, then Gilltraps Museum on the Gold Coast. It can be seen today at the York Museum in WA, owned by car collector Peter Briggs.
As for the first official Australian VW sales, Melbourne's Regent Motors imported the first cars in October 1953 and put them on display at their South Melbourne showroom in December. They were shown at the Melbourne Motor Show in March 1954, and at the Sydney Royal Easter Show in April 1954. The first official sales were in March 1954, when 13 were sold - 9 of them in Victoria, 2 in Tasmania, and one each in NSW and SA. The details are in the April 2013 issue of the Club VW magazine 'Zeitschrift' (you need to be a member to download)
http://www.clubvw.org.au/2013
