BillyFish2,
A JAR FI(R) rating will allow you to teach PPL and CPL straight off the bat. The course is 30 hrs flying plus test, plus loads of groundschool.
Coming from an integrated course you would have a better than most chance of getting an instructing job at one of the professional pilot FTO's ie. Oxford, Cabair, BAE where pay is slightly better, and it is CPL work. However, nothing wrong with PPL training, very similar to CPL anyway!
To teach instrument ratings (IR or IMC) you need to be unrestricted, and complete an upgrade course and test. Night ratings and aerobatics just require an upgrade course.
Good luck with your future flying
Barney