Did Jesus command us to keep only 6 commandments?

Should Christians only keep 6 commandments (Matthew 19:16-19)?  Jesus said He did not come to destroy the Law and the Prophets (including Moses because Moses is a prophet) - Matthew 5:17-18?  Did Jesus come to change the Law of Moses?  What is the Law of Moses?  Did Jesus nail the law to the cross?  Are there ANY laws that a believer are required to obey? Any significant world events will be discussed on this program according to Luke 21:34-36 and 1 Thessalonians 5:1-8.