[nessguy]

Where does 4G connection come into play here?

"Key fob remote start has nothing to do with an app, nor does the car or the fob communicate with any servers managed by Toyota."

It sounds like this $8/month charge is for the allowing you to use remote start locally presumably over RF.

[tqi]

The $8 fee is the remote connect bundle, which is a collection of app connected features (ie lock/start/monitor status of windows and doors) that connect via cell network.

The fob start is a feature they decided to bundle with the others.