Hi
IS-IS - you are right, can't be used via tunnel (even with GRE) so I think you may skip it.
RIP - well, some are still using it. Even large ISPs sometimes need dynamic routing to small customer's boxes that sometimes only support RIP. So RIP is still not dead and I recommend that you have a look at it. I don't know if it is on exam, but it is very simple protocol so it will not take too much time to get familiar with it.