HOW Much, if ANY , of the OT promises To Isreal Apply To Church?

No it was individual just like today. By grace through faith. Abraham believed God and he accounted it as righteousness. That is an individual.
Under the Old Messiah was to come and under the New He has come.

 

Individual salvation did not exist until the Sacrifice was made & accepted by the Father. No one was saved under the law, & all they had was the law under the old covenant. Why do you think those who died in faith under the law went to paradise instead of heaven? Man cannot be in the presence of God without the imputed righteousness of Christ. No human had ever seen God before Christ ascended. Scripture could not be any clearer on the point that NNE has ever received salvation apart from the shed blood of Christ. The Holy Spirit is the seal of salvation. How could one be saved apart from the Holy Spirit? They cannot & were not.

For the law was given by Moses, but grace and truth came by Jesus Christ. No man hath seen God at any time; the only begotten Son, which is in the bosom of the Father, he hath declared him. (John 1:17-18)

Now to Abraham and his seed were the promises made. He saith not, And to seeds, as of many; but as of one, And to thy seed, which is Christ. And this I say, that the covenant, that was confirmed before of God in Christ, the law, which was four hundred and thirty years after, cannot disannul, that it should make the promise of none effect. For if the inheritance be of the law, it is no more of promise: but God gave it to Abraham by promise. (Gal 3:16-18)

(Of whom the world was not worthy) they wandered in deserts, and in mountains, and in dens and caves of the earth. And these all, having obtained a good report through faith, received not the promise: God having provided some better thing for us, that they without us should not be made perfect. (Heb 11:38-40)

Now if Christ be preached that he rose from the dead, how say some among you that there is no resurrection of the dead? But if there be no resurrection of the dead, then is Christ not risen: And if Christ be not risen, then is our preaching vain, and your faith is also vain. Yea, and we are found false witnesses of God; because we have testified of God that he raised up Christ: whom he raised not up, if so be that the dead rise not. For if the dead rise not, then is not Christ raised: And if Christ be not raised, your faith is vain; ye are yet in your sins. Then they also which are fallen asleep in Christ are perished. If in this life only we have hope in Christ, we are of all men most miserable. But now is Christ risen from the dead, and become the firstfruits of them that slept. For since by man came death, by man came also the resurrection of the dead. For as in Adam all die, even so in Christ shall all be made alive. (1Cor 15:12-22)

And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him. And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren is cast down, which accused them before our God day and night. And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death. (Rev 12:9-11)