According to II Corinthians 5:17, yes, they do.
"Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new." (KJV)
Jesus Christ preexisted the creation. Man is part of the creation.
The Triune God is the source of all the blessings of creation and salvation. God the Father, and God the Son, and God the Holy Spirit. When ever Jesus preformed miracles on earth it was through the power of the Holy Spirit and when a person comes to Christ it is the power of the Holy Spirit who drew that person and gave them all the many facets of Salvation that a person receives at that time. God is the source of everything.
From a Jehovah's Witnesses viewpoint it would be Jesus, the first born of creation. The first human person would be Adam.
The person must first admit and accept that Jesus came and died for him, and he is a new creation.
No because maybe another person as important as Jesus will be born and become Jesus' twin.
The whole thing, Jesus is God.
Because when a person receives the Holy Spirit, he/she is supposed to live out his/her life as a Witness to the Gospel of Our Lord Jesus Christ.
Confess Jesus as Lord of your life and ask him for a new heart.
Confess Jesus as Lord of your life and ask him for a new heart.
Yes.
Christ Jesus is the highest creation of God.
Once you do believe in your heart that Jesus died and arose for your sins then you are very much saved, but people do take a water baptism as a outward sine to the world that you are indeed saved. But your actions will now count.