Ok let's see..
First off, Congrats on getting your MPNP Approval letter
To answer your questions, regarding your IELTS scores in order to be on the safer side I would strongly suggest to include your expired IELTS scores along with a letter of explanation (with proof - as in include web links from CIC website where it says that test scores are required only for for NOC C & D and that you indeed belong to NOC A).
Yes, you are right.. Education, work, and/or bank documents are NOT required. You will only need to submit your Criminal background check record certificate and upfront medicals (if you have already completed your medicals in the past one year from a CIC panel physician)..
No, you don't need to submit your MPNP application copy along with your CIC application package. They only meant to tell you to submit your MPNP approval letter.. So you can scan your MPNP approval letter (for your records) and submit the original along with your application.. I hope that clears up all your doubts..
Please follow the CHECKLIST for CIC PR application and you'll be fine..
If you have any further questions, keep them coming..
Good luck!