Joseph can be found in the old testament , in the book of Genesis.
Joseph was sold to potiphar who was the second most important besides the pharoah
No, they are two different people. Joseph lived in the Old Testament times (see Genesis) and Joseph lived in New Testament times. (Joseph was not really the father of Jesus, God was, but Joseph was only his earthly father.)
Potiphar
It is Joseph.
Probably Christ - God's son, adopted by Joseph. can't think of any in the old testament
There is no book or person called John in the old testament.
Joseph
The old testament is important to the Jews, but also to all christians.
Joseph wore a coat of many colours which made his elder brothers jealous.
There is no patron of the old testament, each book was written by a different person
elijah