you wouldnt need one when going into uni.
But it would be handy to have one at home. But aying this, a it isn't essential to get on when travelling into uni, yuo could get away with a desktop.
A lot of the time you will be using programmes on the computer which you will have to buy or get naughtily, and when it comes down to using them it is usually much more simpler doing it at university, ad then you dont have to wait for things to download etc.