Just go to carsales.com.au or carpoint.com.au
You can get a high mileage R34 GT-T for like 14k in Victoria, so you might as well get that rather than a R33 GTS-T if it's only a few grand cheaper.
http://www.carsales.com.au/all-cars/result...ng|0&D=gt-t
Pay a little extra for quality/no crash history or if you want it to come with modifications.
Your Indian licence MUST have an English translation. Check with Vicroads whether you're ok. And if you get PR you have a 3 month window to get a Victorian licence before you're off the road.
I think the P-plate restrictions on power to weight or turbo cars may not apply to you with an overseas licence, but the under 20/under 25 insurance excess sure will.
R34 GT-T insurance would be obviously less than GTRs. Very ballpark figure, who knows, $5000/year, $2500 excess? Ask Just Car Insurance or Shannons, or one of the smaller insurers.