He's not one of my 'heroes', and I haven't read him; but so many books refer to his beliefs that I have read about him a fair amount, and I get the impression he believed in total depravity, unconditional election, particular redemption, irresistible grace, and the eternal perseverance of the elect (or eternal security, whatever you wish to call it). If I am wrong, it would be no big deal for me, as he is not really part of my mental furniture
I'll hit this a piece at a time:
This was in response to Pelagianism, sweeping the West. He went overboard concerning this. To read a moderation of the teaching, read some St. John Cassian.
He wasn't a Calvinist afterall
No he didn't. The elect as we know the term is of a different meaning in Greek and in Latin. It does not mean what Calvin tried to change the definition to.
Read City of God, that'll put that one pretty much to bed....he did not believe in irresistible grace.
I did some reading up on this, and I believe that the idea that St. Augustine believed this is again, a reaction to his attacks on Pelagianism.