Your ITA is an application under the Skilled Migrant Category. If successful, the visa you get will be Residence. PR is something you can apply for separately after a minimum of two years, and qualifying.
http://www.immigration.govt.nz/migra...quirements.htm
Here
http://www.enz.org/forum/showthread....979#post455979 is what is happening to your ITA now.
Here
http://www.immigration.govt.nz/branc...ocessingtimes/ is the Auckland area's own best guess of timing at present, which will be based on recent averages. It's
never a promise. Also, as you're lodging this application from inside NZ, you must already be on a valid visa, which means you won't have a high priority for processing.