US Student Applying for Bolivian Student Visa?

by Amy
(Arizona)

Hi! I am applying for a student visa and I am struggling to get a legalized criminal record - Arizona is a closed record state and can only give me one for the county that I live in and not the entire state. Does this mean that I need to go through the FBI to obtain a national background check? Also how much is solvency? And if I am a student can my parents be proof of solvency for me?