The currency used in Italy is the Euro, the same currency used throughout most of Europe.
The euro comes in denominations of 5, 10, 20, 50, 100, 200 & 500 euro notes, and 1, 2, 5, 10, 20 & 50 cent coins.
Each country prints its own euro notes and mints its own euro coins. Every country has its own design on one side of its notes and coins, and a common design on the other. All euros, however, are the same size, have the same value, and can be used in all euro-based countries.