If you are going to go, you have to value hard work. It is very expensive and time consuming to go to university. You need to be one hundred percent committed. Dedication is not a bad value either, come to mention it!
I would agree with pohnpei, all you need to do is value learning. All other values or beliefs are irrelevant in the university setting. This may be slightly different if you attend a smaller private college, some of them will have certain things that you must do to be in school.
In my opinion, there is only one value that you have to have in order to go to (or at least to succeed in) a university. To do this, you have to be someone who feels that education is important. Outside of that, there is no other single value that you have to have.
There is no requirement to have any particular set of moral or cultural values. You can be a Christian or an Atheist, you can be conservative or liberal -- it does not matter. All that you have to do is to believe that education has value becuase that will cause you to work hard enough to do well at the university you attend.