For finding y-intercepts find f(0), i.e setting all your x equal to zero, and the result will give you the point where the graph intersects the y-axis in the form (0,f(0)).

For x-intercepts you set f(x)=0, and if it is a function of degree greater than two, and you are not able to use the quadratic formula you could use other methods like sintetic division. But by personal experience most instructors and even books tell you that if the function is to complicated, you are not expected to find the x-ints.