Hello.
You need to learn your way around the Immigration NZ website, as there is a huge amount of information there. Here's one place to start.
http://www.immigration.govt.nz/migrant/ (You will see there links to the various kinds of work visa, residence visa, and student visas.)
Here is another useful starting point.
http://www.immigration.govt.nz/migra...ndguides/lorq/ It is a list of qualifications from various countries which have already been checked out and will be recognized. If your qualifications are not here, they will need to be checked individually by NZQA.
http://www.nzqa.govt.nz/qualificatio...ualifications/
And this is a page from which you can do a Search to see whether your profession(s) are on the Essential Skills lists, and if so, what the qualification requirements are.
http://www.immigration.govt.nz/migra...ls.htm?level=1
I'm sorry there aren't quick and easy replies to give you. It will take you some time to get your heads round everything you need to know. If you get stuck on any particular topic, it may be worth using the Search on our forum, as there are many old threads which may help. Or start a new thread, and if your query relates to something you've found on the INZ site, please give a link to the page you have been looking at, as this will help people to help you.