What do you think.. if Catholics believed that ...

Uh... Catholics DO believe that Jesus Christ died for their sins. Whether or not that would ensure entry into heaven is something that many have debated for a long time. That is a separate debate entirely. Your question, however, is moot since Catholics do indeed believe in Jesus of the Christian bible as sin sacrifice. I'm not sure what would give you the idea that they don't.

Catholics do believe in Jesus Christ but they don't believe that he is our intercessor. That's why they believe in Saints because they believe that since Mary was the mother of Jesus, she is also an intercessor. I don't think that is true because Jesus is the only one that that for our sins and rose from the dead and is sitting at the right of the Father!

As Catholics we beleive we are saved only through Jesus Christ, he died on the cross to open the gates of heaven to us.  But, we must follow his teachings and the ten commandments.  We ask the saints to pray for us thru Jesus.  It's the same as asking someone here on earth to pray for us.  It is a good thing to ask someone to pray for us, whether they are here on earth or in heaven.

yes...because of His blood they have been pardon from damnation for eternity

Well.. without talking about any doctrines to prove that any of them is right or wrong. I believe that there are believers in the 3 main denominations: Catholic, Orthodox and Protestant, as long as they believe in the Bible with no wrong teachings in the core of the Bible. And someone who we call "believer", "born again" or "Christian" should be a "Christ follower". Many people think they're going to heaven but they don't have a personal relationship with God!!

Catholics DO believe that Jesus died for their sins.  We are the original Christian religion!!!  We are the original followers of Christ--we are the church that He built.  With that being said, of course we will get into heaven.  However, the soul must be purified in Purgatory first.  You cannot go to see Our Lord and Savior without having a clean soul.