This is verbal irony because he is saying he drinks to a long life for Fortunato, when he knows he is about to die.
"And I drink to your long life."
This shows imagery because the way the author writes it creates a visual image in your mind.
He accosted me with excessive warmth,for he had been drinking much. The man wore Motley. H ehad on a tight-fitting parti-stripped dress and his head was surmounted by the conical cap and bells.
This is a hyperbole because it is exaggerated to provide emphasis on how angry Montresor is at the past and current actions of Fortunato.
The thousand injuries of Fortunato I had borne as I best could, but when he ventured upon insult, I vowed revenge. You, who so well know the nature of my soul, will not suppose, however, that I gave utterance to a threat.