and does anyone know how much it is to study anestesia .

There are two ways to become involved in anesthesia.  Either become an anesthesiologist, or  become a nurse anesthetist.  Either way it is going to take years of study and thousands of dollars.  Consult your local college for courses of study, preferably a nursing school to start.  Or you can go full out and take your MCATs, apply to medical school, get your MD and then study anesthesia.  The choice is yours.

so do i start in nursing.

and can you go from nursing and then on to being an anesthesiologist                          
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you're going to have to complete your undergraduate degrees and then get into medical school