Difficult to tell really, you tried jumping it from a truck and it still didnt start but i've tried doing that myself in the past and found it difficult if not impossible to get those big croc clips onto those small battery posts, so...whilst it should have started...was the connection solid??
Anyhow if you didnt maintaint the battery for at least 5 months it will be no good now methinks, as a test... charge it up you should get a reading of around 12.5 volts after the charge, then measure it again 24 hrs later...should still be pretty much the same if the battery is good.