1a- either say 'I, too,' or skip the commas b) is OK, but I prefer the word order in a)
2- both are fine.
3 I would say:
Well, my background is Italian, though I was born and raised in Canada
4 both are fine
5 both are fine to me
There's flexibility with the position of words, and it can change the emphasis a bit. for example, with the second, I would use the b) version at the moment at which I learned the truth about the person's emotions- by putting the adverb fiorst I would be giving it greater emphasis.
Student or Learner