If the sun disappears Earth will be a cold dark place and all living things will die
If the sun turns into a red giant which it might in 1 billions year if it is a red giant it will will engulf Mercury Venus and maybe even Earth!
If the sun disappears there will be cold dark nights because there will be no moon light because the moon will have nothing to reflect
If the sun disappears some cars will stop working because there's no energy from the sun
If the sun disappears Earth will have noting to orbit so Earth will have an endless journey flying of into space but sadly we will die before and would not experience the journey
people say the more sun starts aging the hotter Earth gets and scientists say that in 1 billions years the Earth will be 74 degrees Celsius average and that will cause every if not most living thing to die!!!