Unless you are applying to some third rate State school, learn all 15 major scales, minimum of 2 octaves -three if possible for some. All arpeggios. My students also know all scales in thirds. Then - all 3 forms of every minor scale - and arpeggios. Also in various articulations. What is listed on their site for etudes and for literature is a MINIMUM. Your own fine private teacher who is a professional oboist (NOT your band director! Or someone who says they teach ALL woodwinds!) will assist you. Unless you get into, thru, and then graduate from a TOP Music conservatory, you will not have any chance of full time employment as an oboist. They are only 8 full time orchestras in the US now - the rest are per-service. And you are competing with all the ones graduated from the last ??? years. Good luck - but this is harder than getting into med school while also playing for the NBA.
Made every single dollar in my life since 1973 in professional music performance, education, and adjuducation. Multiple conservatory degrees, and billions of hours of practice. Including today . . .