To try to answer the 2nd part of #4: Christ is a just and merciful judge, so all will be right in the end, and we will each eventually have the necessary under

To try to answer the 2nd part of #4: Christ is a just and merciful judge, so all will be right in the end, and we will each eventually have the necessary understanding to choose for ourselves. There are different "degrees of glory" (uh ... lifestyles?) in the hereafter, very roughly summarized as a) the Celestial Kingdom (for those who repent aka believe in Him and change their ways accordingly (usually a process as one continues to learn & improve oneself), receive essential ordinances, making and keeping covenants aka 2-way promises where He sets the terms, with God, and who can have eternal families forever etc goodness all around); b) the Terrestrial Kingdom for honorable persons of the earth who were not valiant in the testimony of Jesus; c) the Telestial Kingdom for wicked who eventually paid the price of their own sins and receive a degree of glory (which, I'm under the impression, is better than this life), and d) outer darkness, reserved I think for those who really knew Christ but severely rejected him. But don't rely on me: go to the official sources (scriptures like Doctrine and Covenants section 76, general conference talks, etc). (minor edit/s above)