No John the baptist comes only in the New Testament.
Jesus is in the new testement but not in the old.
yes, the old testimet is the only testement for Jewish people.
John the Baptist was around 30 years old when he began his ministry.
30 yrs of age is a standard age to enter into the ministry, with some exceptions like little Samuel. Parents educate them well according to the commandment of Jehovah. Every child must be educated in the Law of Moses as well as in other subjects such a politics, science, economics, general knowledge of the world. Attendance to the Synagogues is compulsory, in fact synagogues are the centers of education. Little Jesus was well-equipped by His mother so as to talk, discus the Word of God with the aged, well-educated Jewish leaders of the Temple.
No, John the Baptist is not mentioned in the Old Testament. He is a figure in the New Testament of the Bible.
The book of Revelations is the last book of the new testament, it is written by the apostle John , when in exile on the island of Patmos.
It is in the Old Testament.
2030
The Hebrew Bible
Numbers
psalm
Yes.