For a house that size you're probably between $100-150 on average per month for electrity, of course depending on your usage!
Taxes vary depending on the quality of the house (and price!) but generally you're looking at ~$4,000 to ~$8,000 range, with most houses closer to $5K. I use www.carlsonre.com (broken link) (make sure to select New Hamposhire since this one does seveal NE states) for searching through houses in the manchester area. I lived in Manchester for 10 years and now live in Derry.
And if you find my posts amusing, or helpful feel free to increase my reputation....