In a sentence on each of them:
The CAD is short for the Current Account Defecit - Australia has run a CAD since 1973 (I think, I could be wrong), and it is largely due to overseas loans and hugggeeee net foreign liabilities. You might want to keep an eye on this thread here:
http://community.boredofstudies.org/22/economics/102851/australias-cad.html
The capital and financial accounts deal with reversible transactions that Australia has with overseas, such as loans.
The current account deals with non-reversible transactions that Australia has with overseas, such as goods and services and income.
That's a really rough brief - your textbook should explain in detail, as I said, the 'Leading Edge' book tends to make some sort of sense
If not, as I said, I'll see what I can do about scanning some of my own notes.
Hope that helps, it's basically a cram session because I've got 4U english to do