HOW TO GET TWD
As you arrive at Taoyuan international airport , have 24hrs foreign currency exchange service at the airport, you can change your foreign currency into NT dollar. Have ATM machines at the airport , in convenience stores or banks in Taipei city , you can withdraw the money from there. Please note that the limit of withdraw amount is according to your bank policy, it's better that check with your bank in advance to know how much amount you can withdraw per day before you travel.
In Taipei city, almost all banks have foreign currency exchange service, but normally accept USD, EUR dollars, JPY dollar, HKD ,CYN. If you have pound ,you need to go to Megabank to exchange it, only they have exchange pound service.All department stores also have currency exchange service, but the rate is low.