I do not know about the costs but for your first question.
http://www.eccouncil.org/certification/exam_information/take_exam.aspxShort. If you do not attend classes you will need to fill in the following form to be allowed to take your exam.
http://www.eccouncil.org/home/exam_eligibility_form.aspxAside form that.
Is there any eligibility criteria?
It is mandatory for you to record two years of information security related work experience and get the same endorsed by your employer. In case you do not possess the same you can send us a request detailing your educational background and request for consideration on a case basis.
But I suggest you read the link I provided. I might have missed one or two things.
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