I'm planning to do a course of English in Italy rather than do it in new zealand, what do you advise me?
Yes, that's good. You will need to be able to show that you can use English to the IELTS standard before they will give you a visa.
I leave it to those who know to suggest what to do about where you get your work experience.
the health care system is expensive in New Zealand? I need medical insurance?
If you get Residence, or a work visa for at least two years, you will be able to use the NZ Health Service. Under this service, many things are free, or subsidised.
http://www.health.govt.nz/new-zealan...ility-services You have to pay to visit a GP (general practitioner, the basic family doctor), and for the medicines he presribes, but if he refers you to a specialist or hospital, in general, that is free.
When you arrive in NZ, you can drive for 12 months using your Italian driving licence, making sure you have it, and an English translation, with you all the time. You can get a NZ licence by going through the procedure here.
http://www.nzta.govt.nz/licence/resi...riving-nz.html http://www.workingin-newzealand.com/...driver-licence
I took the test and got 160 points
Sorry to be pessimistic, but I think it's rather unlikely, when you're only just going to qualify in your career, that you can really get 160 points. Sometimes the automatic point checker doesn't work quite right. Because of this, it is a good idea to look here, in the INZ operational manual.
http://www.immigration.govt.nz/opsmanual/6954.htm SM6 has a chart showing all the points available, and the last column tells you which other section to look at to find the regulations about qualifying for each set of points. Doing it this way, you can be SURE what you can have, and won't get any false expectation. (Again, if there is anything you don't understand, give a link to the page you are looking at, and come back to ask any questions.)