No, you don't for most exams but check beforehand in the module information. All willl say you should, but when you look at question strucutures it normally becomes clear you don't have to, occasionally you will have to though.
English Legal System I guess is just about court systems and so on which shouldn't be too bad and you could plausibly learn everything, the chances of learning First class level material for every single area of something like Land or Equity though is quite slim, and just knowing the relevant section of the textbook will likely only lead to a mid 2.1 at best, you'll need to read the cases themselves to understand them.