As for the Passover looking forward to Jesus dying for the sins of the world as the lamb of God, look also at Abraham and Isaac on the mountain. After a long lifetime of waiting for God's promise to come true, and even giving up on it happening, Abraham and Sarah had a baby in their old age. And now God was asking Abraham to sacrifice Isaac on an altar! On the way to the sacrifice, Isaac asked Abraham why they didn't have a sacrifice, and Abraham replied that God would provide the sacrifice. Jesus is that long-awaited promise and also the sacrifice God provides. And I'm not trying to prove that Jesus was the true meaning of passover--I'm reporting what *he* said at his last supper with his disciples, a passover meal. Here's what he said, one of several accounts in the New Testament, Luke 22:7-20:
The Last Supper
7 Now the Festival of Unleavened Bread arrived, when the Passover lamb is sacrificed. 8 Jesus sent Peter and John ahead and said, “Go and prepare the Passover meal, so we can eat it together.”
9 “Where do you want us to prepare it?” they asked him.
10 He replied, “As soon as you enter Jerusalem, a man carrying a pitcher of water will meet you. Follow him. At the house he enters, 11 say to the owner, ‘The Teacher asks: Where is the guest room where I can eat the Passover meal with my disciples?’ 12 He will take you upstairs to a large room that is already set up. That is where you should prepare our meal.” 13 They went off to the city and found everything just as Jesus had said, and they prepared the Passover meal there.
14 When the time came, Jesus and the apostles sat down together at the table.[a] 15 Jesus said, “I have been very eager to eat this Passover meal with you before my suffering begins. 16 For I tell you now that I won’t eat this meal again until its meaning is fulfilled in the Kingdom of God.”
17 Then he took a cup of wine and gave thanks to God for it. Then he said, “Take this and share it among yourselves. 18 For I will not drink wine again until the Kingdom of God has come.”
19 He took some bread and gave thanks to God for it. Then he broke it in pieces and gave it to the disciples, saying, “This is my body, which is given for you. Do this to remember me.”
20 After supper he took another cup of wine and said, “This cup is the new covenant between God and his people—an agreement confirmed with my blood, which is poured out as a sacrifice for you.
from http://www.biblegateway.com/passage/?search=Luke%2022&version=NLT