Total as in all areas, not total as in every single decision that's made. That's why it's not meant as sinlessness. No one teaches that(well, at least no one in whom we are talking about)
I think we might have to agree to disagree, at least in part.
How does total submission to Christ not equal perfection?
See above...
This is why it's important for people to define their words. Many arguments could be solved by just defining words. You defined total submission differently in how others were using it. I'm not saying either is right or wrong in the definition, but just different and we must understand that difference in discussion.
Repentance is a change of mind. It results in a changed action, but repentance in and of itself is no works. True repentance will result in changed actions. Luke 3:8-14; Acts 3:19). Acts 26:20 are a few examples of repentance for salvation and they also speak about the results of repentance. "performing deeds in keeping with their repentance." (Acts 2:38; 3:19; 11:18; 17:30; 20:21; 26:20) are a few others. Jesus taught repentance many times. Matthew 4:17 is one example. 2 Peter 3:9
Also remember that reptance is a gift from God. 2 Tim 2:25, acts 11:18
The thief died, so it's not a valid example. And no, he's not saved by works. Abraham was justified by faith. His faith was demonstrated by his works according to James. The Bible does teach that we are changed people and we will product fruit. I take a person by their word that they are saved as I cannot see their heart. Their actions though will demonstrate what's in their heart.
But understand what he means and not change it to mean something else when he has clearly said what he means.