I've taken the TPR course and the real MCAT.
Based on what I saw on the real MCAT:
TPR verbal is way harder.
TPR biology is comparable.
TPR physical is slightly harder.
The Science Workbook is gold. Do everything in there.
The ICC is ridiculously hard. Take the timed section seriously, but don't fret about your performance.
The AAMC's I took, #9 and #10, were easier than the real thing, in all sections, but my AAMC practice scores were more representative of my actual score.
They give you tons of practice tests. 17 total from what I remember.
If I were you I'd focus on the Science Workbook and take a TPR test once a week. Then, when you get closer to your test date, maybe within a month of it, take AAMC #7-10.
Do not ****ing neglect anything. My TPR diagnostic was ~5 Physical, 5 Verbal, 10 Bio. I went above and beyond with my Bio prereqs and after my diag decided to neglect the bio section. I ended up with a 11 Physical, 11 Verbal, 8 Bio. Unlucky me.