The Resurrection Of Jesus Christ

What is the greatest difference between the religions of this world and the Gospel of Jesus Christ? Who is this One Who died? Why did He come and How did He fulfill His purpose? Is there only one true Gospel? Is there salvation outside of Christ Jesus? How is the life Christ lived significant to His people? How did Christ's death pay the penalty for His people? How is His death proof of the satisfaction of the law? Can the Gospel be explained to those who don't believe? What does Christ's resurrection mean in regard to salvation?