Only the New Testament has references to Jesus.
Abraham is first mentioned in the Old Testament.
Yes, James is not mentioned in the Old Testament.
The colt, donkey ass were mentioned in the old testament.
Yes, Jonah is mentioned in the Old Testament in the Book of Jonah.
The judges mentioned in the Bible are from the Old Testament.
No, John the Baptist is not mentioned in the Old Testament. He is a figure in the New Testament of the Bible.
Titus is mentioned in the New Testament.
Most likely God is mentioned in the Old Testament in what he said and did for His people.
Yes, baptism is not explicitly mentioned in the Old Testament scriptures.
The name is mentioned 26 times in the Old Testament.
Hell is not mentioned in the Old Testament; the concept first arises in the New Testament and contemporary Rabbinical writings. The Old Testament generally refers to "Sheol" which appears to be much more similar to the Greek Underworld than the current concept of Hell.
Hell is first mentioned in the Bible in the Old Testament book of Deuteronomy, specifically in Deuteronomy 32:22.