Auto service (toyota and lexus ) specialist recommends

Flushing the power steering system
Fuel Injection Service
Top Engine de-carbon (seafoam)

Are these services worth the money. We hope to drive the car another 100,000.

The car has 134,000 miles and I don't have any records on this work being done by the previous owner.
Others recommend:
transmission fluid exchange and rear differential service

What should I do