I'd say a broom
Weather works pretty well. Try a storm or a sunny day. Give it human traits: smiling, frowning, roaring angrily, laughing. That's personification.
The old computer was not going to be used again.
Yes, because only witches have "which's." Using "whose" in referring to an object does to some extent personify the object.
..... If you have a household runway maybe
it is a melodrama
[object Object]
Armchair
The verb form of the noun "person" is "personify."
Straw
grocer
He was scared of cats.
butter