The radio and CTA and/or CTR exams are most probably in-house exams to ensure your theory is up to scratch for the grant of those endorsements. And, yes, if you're operating in and out of Jandakot, you'll automatically cover the training part of those endorsements as part of your flight training anyway. This wouldn't be the case if you were getting a RPL from a flight school operating at an uncontrolled aerodrome (at least not the CTR part) and would require further training.
Most of you are saying to proceed straight to PPL however my local flying school (which is the most popular choice here in Perth) presented an informational leaflet saying that there are 3 main stages 1. First solo 2. RPL 3.PPL Again just to clarify again it is most likely cheaper to go straight to PPL?
Keep in mind that the PPL curriculum is just the RPL training + the navigation part. If you wish to have a licence at this mid point, then you'll have to sit the BAK and pass the flight test to obtain a RPL. With said RPL, some flight schools will let you fly the solo navs of the PPL training at the solo rate. Others will still charge you the dual rate (they claim that they're "supervising" you, hence the fee but it's mostly a sham).
If you forgo the RPL and carry on straight to the PPL, you'll save on the intermediate flight test and licence issuance fees.
Any flight school that tells you that you
must do the RPL as a prerequisite for PPL is dishonest.
Do read the attached CASA flight crew licencing manual, esp. the table at §6.3.