Your 100,000km service should have been performed nine (9) years ago - service intervals are based on mileage travelled OR time interval, whichever comes sooner.
So really you should be looking at a 12 year service (which doesn't exist - service book goes to 10 years).
But back in the real world you probably should be doing a 'full' service which includes flush and renew coolant and brake fluid - oil and filter change - transmission service - fuel filter change- air filter change. Anything else is probably 'overkill'
You didn't state whether you will be doing the service yourself - if you do it yourself you will save many dollars and probably only spend about $200 on parts.
If you take it to a service centre or Holdens and ask for a 100,000km service then the sky is the limit but I'd guess at $600.