"Here I am."
Abraham
It is called the "Covenant"-- the promise Abraham made with God, and God made with Abraham.
God called Abraham righteous because of his faith and obedience. Abraham trusted in God's promises, demonstrated by his willingness to leave his homeland and obey God's commands, such as when he was prepared to sacrifice his son Isaac. This faith and obedience showed Abraham's righteousness before God.
God, Abraham and Moses are all still called by their names. Only Jacob's name was changed and he is now called Israel.
Abraham lived in Ur first and then Haran before he was called by God. The story can be found in Genesis 11:31.
Most usually think of Moses, but God also called Abraham His friend. (Isa 41:8)
Abraham
Abraham (or as he was called before God changed his name: Abram)
No, I don't believe he was, it was God who called him to leave his family. This is what I believe is stated in the Bible. It does not state that he moved about before God called him.
The Abrahamic Covenant.
Abraham is not a god and Jews do not recognize him as a god. However he is considered a patriarch or father in the respect that he was the father of Isaac and through his seed came Jesus. One popular Bible scripture for Abraham is: James 2:23 And the scripture was fulfilled that says, "Abraham believed God, and it was credited to him as righteousness," and he was called God's friend.
Abraham chose God before God chose him. Abraham, on his own, had rejected the idols his family and country worshiped and intuitively followed the teachings of the Torah. It's for this reason that he is considered the spiritual forefather of the Jews besides his being their ancestor.