Welcome to the sandbox! Glad to have you.
As far as your list:
1. The white pauldron is acceptable. It doesn't have to be orange as there were white ones in the movie.
2. A backpack is not required for basic TD approval. If you want deployed or SWAT, then you'll need one. You can troop as a TD while you work on your pack.
3. Don't forget, TDs do not have drop boxes or a holster. So remove those as well.
4. Depending on how far you want to take this, you might reconsider changing out the 4 button strip for a 3 button one. The higher certifications require a 3 button strip.
Good luck and let us know how we can help.