Q. Do mormons believe in salvation? Do they believe in asking God to come into your heart? Who do they pray to?
Yes, Mormons do believe in salvation. We believe that mankind may be saved through Jesus Christ and may live in the presence of God provided that we are prepared for it.
Asking God to come into your heart is a valid request but it must be noted that God has a physical body and so cannot actually dwell in our hearts. Intead, He sends the Holy Ghost to comfort us and accompany us.
Mormons pray to God, the Father, in the name of Jesus Christ.