You do not need to send AP/IB scores if you did not report them on the application.
If you reported any of these scores, then you have to submit them.
You do not need to take any AP Exams (they are not required for admission).
For the second question about financial aid:
You do not have to submit anything at all. UCLA just wants you to check out what financial aid they are offering you.
You can find it at https://sa.ucla.edu/fao/epalshopping