[Ali Imran]

What does this verse mean to you? Who does it refer to ?

The Holy Trinity  is the Alpha and the Omega. Jesus' death did not just redeem the lives of those that came AD, but also those who came before him since Creation, if they would renounce sin.
It remains the same even today. It is not enough for us to claim we believe in Christ, if we do not turn from our sinful ways we will still face eternal death.

Thus even if Ezekial came before Christ, his message was from God who had already planned for his only Begotten Son to save the world [since creation till the end] from death if they would renounce sin.

Is eternal death the same as hell which is eternal torment?