The Story of Two Sons

Are there some who don't need repentance? Who does the elder son represent? How does the Father unconditionally love each of the two sons? Are both true sons? How is the elder son represent the church of Israel and the other the gentile church? Does it take more mercy to forgive a wanton sinner or a prideful sinner? How is there only one Righteousness imputed to every saved sinner? Does God make a distinction between other fathers and sons? Did the Father's wealth diminish any when He gave to them their inheritance? Do we ever waste and abuse God's Grace? Did God's attitude change toward either son? How does Paul see himself as like the elder son in the sin of Spiritual pride? Did both sons depend on the wealth of the Father? How are all things gathered together in One? How is God's desire His command?