winter is a killer, it kills all the plants
Dangerous
It was as pretty as a flower or it was as tall as a skyscraper. Sorry, I'm not that good at personification.
chattering cake
Personification? I hardly know what that phrase really means because I think you messed up the wording.
A good personification of a clock could be "the relentless timekeeper," symbolizing the never-ending march of time and the limitations it places on our lives.
the trees waved their branches at me.
dance sway sing
money ran away
i tried to cut an apple
Metaphor
Depends. If he is a good writer then he should include personification and if he's not he, most probably wouldn't