Jesus, a whole day and the best you've got is:
Of course it matters.
Good thinking. Lull them into a hypnotic but false sense of security and then BAM.... ; )
In the minor pentatonic which is the basic blues scale a perfect fourth. You can't have a major or minor fourth. There are no such things you see. You could of course add an augmented fourth* to act as a passing note between perfect fourth and fifth, and thereby creating a new blues scale with an extra note. Or a minor hexatonic if you like.... ; ))
Uuuh, pentatonic doesn't have a sixth degree. Just the five, hence penta. You can start it wherever you like, as long as the notes are correct, but you would usually start it at the root for the purpose of demonstrating or learning the scale. But I think I know what you mean. Major and relative minor pentatonics share the same notes so, eg in the key of C you'd have C D E G A for C major pentatonic and A C D E G for the relative minor pentatonic. But obviously you wouldn't start C Minor pentatonic on A, not least of all because the scale doesn't have an A anyway..... ; ))
*or if you prefer, a diminished fifth.