Salut Smartina. Okay, there are a number of options which might be good for you.... The most important thing I need to know before I make a recommendation is... are you from Europe or from outside Europe?
Oui, je peux voir que tu habites en France en ce moment-la, mais ca ne veut pas dire que tu est francaise...
If you are resident or have been living in an "Interrail Community" country (or a selected neighbouring country) for longer than six months, you can get the native European equivalent to Eurail which is the Interrail pass... and on the whole an Interrail pass tends to be much better value than Eurail, especially if you want to do a lot of travelling in a short space of time.
The Interrail Community countries are as follows:
Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Luxembourg, FYR Macedonia, Morocco, Netherlands, Norway, Poland, Portugal, Romania, Serbia & Montenegro, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom
According to Interrail Terms and Conditions, you need to have been resident in one of these countries for at least six months to be eligible to buy an Interrail ticket. You can also get the pass if you have lived for at least six months in one of these neighbouring countries :
Russia, Byelorussia, Ukraine, Moldova, Estonia, Latvia, Lithuania, Algeria, Tunisia, Cyprus, Malta, Iceland.
If the country in which you have lived for at least the last 6 months, is not shown in either list, you are not eligible for an Interrail pass.
If this is the case, all is not lost. You can still get an Italy-only pass called the TrenItalia Pass Youth which is fairly cheap, but doesn't seem to provide much flexibility (only four days of travel in two months) - not really ideal for two weeks of travel.
And there are other passes too.... there's at least one I can think of which covers both France and Italy and it may be more flexible than TrenItalia.
If you can get back to me on where you've been hanging out for the last six months, I can give you a list of railpass options with prices and so on. I'll also let you know which of the railpasses cover the trains to smaller destinations - most should - or whether you'll need to factor a couple of bus trips into your itinerary.