The Catholic church teaches about the saints. Can that be true? I did not see any ref in your question and answer section on saint topic.
Every Christian is a saint. “beloved of God, called saints.” (Romans 1:1) “to them that are sanctified in Christ Jesus, called saints.” (1 Corinthians 1:2) All it takes to be a saint is to be loved by God and sanctified in Christ Jesus. It does not require miracles or election or stigmata. It just requires faith and sanctification.
Saints are also people who are alive. “But now I go unto Jerusalem to minister unto the saints. For it hath pleased them of Macedonia and Achaia to make a certain contribution for the poor saints which are at Jerusalem.” (Romans 15:25-26) These people were certainly not dead; otherwise they would not have needed money.
Saints do not have any special status in interceding with God. In fact, they need intercession. “And he that searcheth the hearts knoweth what is the mind of the Spirit, because he maketh intercession for the saints according to the will of God.” (Romans 8:27) If they are on earth and require the intercession of the Holy Spirit on their behalf, how can they take prayers to God on the behalf of others? Yes, we all can pray for others, but God listens to all Christians, not just a select few.
I knew a man in San Diego named Diego. After he was baptized I went up to him and said, “Congratulations. Now I can call you San Diego.” I was right in doing so, because he had just become a saint, as were all who trust in Jesus unto salvation.