The Toohey's Old lends itself to extract brewing as a lot of the flavour comes from the dark malts, which only need steeping. I've just done an All grain old, so for a roughly similar extract version of my own recipe I would go for:
2.0 kg LDME
500g wheat malt extract (the other half of the tin should store ok if you clingwrap it in the fridge)
750g dex or white sugar (Tooheys Old contains 30 percent sugar)
Steep 200g choc malt (Joe white choc chit is nice) plus 100g Carafa T3 (a black malt) in 4 litres of hot water for an hour and keep to about 70 degrees. Strain the runnings into a stockpot, and add about 300 g of the LDME to help the hop utilisation.
IN the stockpot add 35g Pride of Ringwood or 20g Superpride and boil for 60 mins. That's all the hops you'll need as an Aussie Old should not have hop aroma, just some balancing bitterness.
Strain the whole thing into the fermenter. In the stockpot bring the extracts and dex to the boil in about 4 more litres of water, just to sanitize for five or ten minutes and pour into fermenter.
Use a good ale yeast such as Nottingham or US-05 and keep the temperature about 17 degrees as you do not want to develop fruity esters. This should be a dry, clean beer.
I'm not sure about the lager as I've never made an extract only lager, just kits, so maybe someone will help you on that one
Cheers