Mark 1:1 The beginning of the gospel of Jesus Christ, the Son of God.

All the words, "gospel," "Jesus," "Christ," have meanings.

The word gospel is not used in the Old Testament. The word, news (that is for "good new"), is used only once: 

• As cold waters to a thirsty soul, so is good news from a far country. (Proverbs 25:25)

The gospel quenches the thirst of the soul. It answers the questions of eternity, the questions of life.

• O God, thou art my God; early will I seek thee: my soul thirsteth for thee, my flesh longeth for thee in a dry and thirsty land, where no water is; (Ps. 63:1).

Jesus is the living water to quench our burning thirst.

• John 4:14  But whosoever drinketh of the water that I shall give him shall never thirst; but the water that I shall give him shall be in him a well of water springing up into everlasting life.

• John 7:37  In the last day, that great day of the feast, Jesus stood and cried, saying, If any man thirst, let him come unto me, and drink.

The name Jesus means Savior. Jesus is come to save man from his sins. That is, to free him from the guilt and power of sin and finally from the presence of sin.

• Matthew 1:21 And she shall bring forth a son, and thou shalt call his name JESUS: for he shall save his people from their sins. 

Christ means anointed one or "Messiah" . This is the first reference in this gospel to a messianic prophecy in the Old Testament. It refers to Daniel 9.

• Daniel 9:25  Know therefore and understand, that from the going forth of the commandment to restore and to build Jerusalem unto the Messiah the Prince shall be seven weeks, and threescore and two weeks: the street shall be built again, and the wall, even in troublous times.

The weeks referred to here in Daniel 9 are addressed specifically by Jesus in Mark 1:15. I'll leave comments to that point. Daniel 9 is, however, an outline of the dates for the baptism, ministry, and crucifixion of Jesus. It is one of the most stunning proofs for the authenticity of the Bible.