Judaism doesn't have baptism, that is a strictly Christian ceremony.
Yes he was actually the first one to give christian baptism
Christian baptism started with the Apostles, and then with them baptizing those who came to believe.
Baptism initiates us into the Christian community.
Christian baptism is approximately 2000 years old.
Baptism is a Christian concept.
Baptism can be for other Christian faiths, not just Catholic. So if you are becoming a Christian, you are baptised.
According to the Catholic Catechism, bishops, priests and deacons can perform baptisms. In extraordinary circumstances, however, anyone can perform a baptism. See http://www.usccb.org/catechism/text/pt2sect2.htm#1256
Jews do not have baptism. It is a Christian observance.
in baptism
From the RC point of view: The Sacraments of initiation: Baptism / Communion / Confirmation. In current times "Baptism", and baptism alone is considered the entry life into Christian life.
Roman religion did not have baptism. Only Christian Romans had baptism and their beliefs about it were the same as that of modern Christians.