I Have two questions 
1.After the high court found in favour of the commonwealth and declared that under S51 External Affairs, that the commonwealth did have the power to legislate in that area to ensure that international treaties could be upheld, did it become a concurrent power?
2. Are we required to know about all the different types of government bills such as private member bills etc....
Thanks 
1. Yes it now becomes a concurrent power, this case increased the commonwealths power but at the expense of the states as they now can't make inconsistent laws to the commonwealth because of section 109
2. Im pretty sure we don't have to but not 100%
Someone please correct me if I'm wrong, but this is my understanding...
1. The external affairs power is an exclusive power which can only be exercised by the Commonwealth. What the High Court did decide was that the Commonwealth had the ability to use their external affairs power to ratify an international treaty, even if that treaty involved an area of residual power as it did in the Tasmanian Dams Case. Because of Section 109, the legislation created by the Commonwealth overruled that of the States. The external affairs power remains an exclusive power of the Commonwealth, and the power to legislate over environmental issues remains a residual power.
2. You should probably know that supply (money) bills can only be introduced by the lower house, as the upper house can't introduce these types of bills.