Acts: But What About the Old Way?

As Christians today what do we do with the Old Testament laws? Are we supposed to keep the dietary laws and eat kosher? Are we responsible to keep the Passover, Jewish Sabbath, New Moon, Feast of Tabernacles, Circumcision? What does it mean that these were supposed to be perpetual or everlasting... then, how can they be ended? Are Gentiles supposed to become Jewish? These are big questions facing the apostles, especially as the gospel was reaching Gentiles, and they were coming into the churches. In Acts 15 the council in Jerusalem meets and these issues are worked out. These issues challenge many even today.