What About Those Who Never Heard the Name of Jesus?

Questions about what will happen to those who never heard of Jesus or were brought up in a different faith, whether there’s biblical warrant to think a humble, repentant attitude can save people who don’t know Jesus, and where the souls who lived before Jesus go.  

• We’re taught that the only way to Heaven is through belief in Jesus, but what about those living on this planet who never heard of him, those brought up in another faith, or those of a Jewish faith?
• Is there any biblical warrant for thinking that those who haven’t heard of Jesus will nevertheless be saved due to a humble, repentant attitude?
• Where do the souls who lived before Jesus go since they couldn’t be baptized or saved?