Could some one who lives in Florence have a look at this and confirm if the prices given for Florence are accurate, please.
I don't live in Florence but the great thing about Numbeo is it's user generated content. The prices on there are averages of those that are put in by it's users. They should give you good ball park figures.
You can also use our cost of living in Italy page as a source to cross-reference with.
What are the particular expenses you are concerned with when it comes to your move to Florence?