Would this mean there is no other way but to get a job offer?
No. Anyone can put in an EOI with any number of points starting from 100, and 130 is quite a good total - that said, just lately there have not been selections involving any but the highest criteria. But in the past, the draws have tended to widen their scope towards the end of the year, because INZ are working on a yearly quota of skilled migrants accepted, and as time goes on, they can see how the acceptances are running.
Could you please advise what are the procedures the employer has to undertake to issue a job offer? Do they have to tender the position in NZ before offering you the position? If so is it a big pain in the neck for an employer to do so?
It varies with which regulations they are operating under (and that can affect which visa you get first). Here are some links with information.
http://www.immigration.govt.nz/migra...quirements.htm http://www.immigration.govt.nz/migra.../requirements/
I don't have personal experience with job seeking, but you'll find plenty of first-hand accounts on the threads.