Do I have to show full year tuition fees and one year living expenses in my bank account for New Zealand visa?

Yes, for a New Zealand student visa, you are generally expected to show funds for 1 year of tuition fees (or proof that the fees have been paid) plus 1 year of living expenses. The living expense requirement is commonly around NZD 20,000 per year. Funds can be shown through bank balance or as an approved education loan