Pilgrim, in answer to the questions, I'm sorry, I don't know how to insert the quotes, so I must just number them, I'm stupid about some things so bear with me.

1. Regeneration - simply put, it is the beginning of spiritual life. It is brought about by the knowledge of God.
Jn. 17:3 "And this is eternal life, that they may know Thee, the only true God, and Jesus Christ whom Thou hast sent,

I pointed out that they had the ability to know God by His being present among them, and rightly said, the sacrifices pointed toward the redeemer, which was their future hope.

2. The spiritual condition of the O.T. and N.T. is the same respecting whether they were dead or alive. Those who God draws to Himself, He revealed His true self to them. They were given understanding. God drew the O.T. saints to Himself, making Himself known. This knowledge was more complete than the knowledge of the demons and was life producing. They had communion/fellowship with the Holy Spirit of God. Remember, at the first sin, man was separated from God, life is being brought back into fellowship with Him and this is accomplished through the blood.

3. The spiritual condition of all men is that they are born spiritually dead in trespasses and sin, without God in the world as mentioned above. The difference in the covenants is the sealing of the Spirit. We now have the witness of the Spirit in us where they did not have that. I will try to expand on this more, but am pressed for time right now.

4. The O.T. people were saved just as we are today. The five solas of the reformation are the same for both testaments.
They excercised faith - Sola Fide
This was done by grace alone, God drawing them to Himself
Done through the word alone (revealed through signs and spoken/written word)
Accomplished through Christ alone, Ceremonial law pointed to this
For the Glory of God alone

Since I answered your questions, would you answer mine in the previous post?

Hisalone
Matt. 6:33 But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you. KJV