First of all, you are long way from a pharma job. Most require you to be at least 21 and the job is VERY competitive and you are going up against hundreds of applicants for the same position. My husband is a pharma rep and its hard to get hired, especially fresh out of college.
You should be given a public defender. If you do not want a public defender then your only recourse is to hire your own attorney. Maybe it is time to ask your parents for help. So you lose the new car, big deal. At least maybe you can get this off your record.
If you are convicted of DUI then you are basically out of the loop for pharma for at least 39 months.