Your Cv should be easy to understand and should give a nice overview of your experience and your qualities.
There should definatly be a picture in it, as it has become the standard. You should include your level of education, your work experience and your personal traits.
The employers skim through cvs pretty fast, if you lack any of the above, your CV will be discarded pretty quickly.
Remember to clearly state that you have a place to live in the city your applying to (if you do). Try to write the application in norwegian if you think it can be understood, it will show your willingness to learn.