# put the crown on him
This is a symbolic act to show that they are making him king.
# gave him the covenant decrees
"presented to him the covenant decrees that he should obey". It is unclear if these decrees were a portion of the law of Moses, or a separate set of rules for kings to obey.
# anointed him
This was a symbolic act to show that he was chosen by God to be the king.
# Long live the king
"May the king live a long life"