i need help for living in Iceland and work

I recommend you start with reading the visa requirements here:

http://utl.is/index.php/en/work

in order to move for work, you need to find an employer who will sponsor you, and they can only do that if you're providing them with skills they can't find/hire in the domestic or EEA labor market. As a cook & waiter that might be quite difficult.

hello
thank you very much for explain me , but please tell me where i can find job and where i can apply. if possible you help me

restaurants generally hire people directly that are actually able to start work soon, as waiting for a cook or waiter to arrive for several months (the visa processing time) is not generally how they work. The best way would be if you can visit Iceland as a tourist and actually go to places.

here are some food related jobs posted, but you see that Icelandic will be a necessary skill to learn some basics in so you can a) read the ads and b) serve Icelandic customers http://job.visir.is/

Yes, but you are European so, it's easy for us to find a job in another European country. But, as says ECS, it's very difficult to a non-European citizen to find a job if Europeans people can do this job...

Who tell you to?