I am assuming that you are a citizen of European countries and would come to US with student visa. In that case, I STRONGLY recommend you to look into requirements and regulations of student visa (especially, financial and employment/working regulations).

>>Yes, I am European citzen does it mean that as a student I would not be eligible to work in US?

In general, you are not allowed to be "employed" in the US as a student visa holder, and you may not work as a independent contractor (freelance) either. There are exceptions for this rule, and one of them would be approved campus jobs (and that probably is the only exception you are qualified eventually).

In order to prevent international students working with student visa, you must provide the evidence that you (or your financial provider) have at least the amount of one year of tuition and living expense when you apply to the visa. The amount that you must prove to show in order to apply visa would be different for each school and your scholarship status. Tuition would be anywhere between $8,000 to $20,000 and living expense would be $5,000 - $10,000.

If you get a full scholarship from the school, the document (it is called i-20) will say your yearly expense would be your living expense only.