Welcome here, and good luck with the move!
Now the questions:
1) Not at all, many people don't drink wine here, I don't particularly appreciate it too. No one will say you anything, you'll just lose some of the fun

2) They would not kill you, but you won't sell one single cup in centuries. We don't like that black water you call coffee, and you can probably find it only in a dozen of place around Italy. But don't worry, once you get used to the strong taste of Italian coffee you won't be able to do without.
3) The hours can vary alot dipending on month and place. Generally bars open around 7AM and close around 8PM, and in big cities they don't do the lunch pause.
4) I'm never been in Como so I wouldn't know, but I suppose it wouldn't change much.
Welcome again!