Don't even think about jumping into a taxi. The walk around the city is really nice and you can find something interesting to see almost everywhere. It's one of the most important cities in Romania . For food I will recommend you Bolta Rece or Hanul Ancutei(not in Iasi, but if you are in Moldova, try to find it). Traditional Romanian food, traditional music and very friendly people. For money it's better to go to a bank.It's safe and the exchange rate is good(BRD,BCR or Bank Post). If you don't know Romanian it's not a problem. You will find people speaking English almost everywhere, especially young people. Don't hesitate to ask for directions!