For the question of my young junior recognizing my elder:
Unless some of the major assumptions I'm currently operating under are wrong, this should never happen intentionally. If I did meet him, my elder self was disguised well enough that I didn't recognize him, because I have no memory of meeting my elder self. Any other outcome leads to paradox, and paradox is bad. (If my assumptions are wrong, then no, I don't recognize me. I've changed too much)
For the question of meeting my elder of 20 years:
I would not speak unless spoken to, once I know it's me. If he has something important to tell me, he'll tell me. Otherwise asking unprovoked questions is just going to be met with some variation of "Further information is not available here". (Though if elder me has a sense of humour, he'll use that exact phrase, knowing where it's from)
I wouldn't want to know too much anyway, other than whether my basic assumptions are right. Beyond knowing that I'm still around then and that I do eventually become a time traveller, knowing too much of my own future just locks me into having to do things the way they're supposed to happen to avoid paradox. Simply meeting myself would make me extremely happy. (Again, if my assumptions are wrong, then lottery numbers I guess? And any obstacles to me becoming a time traveller so I know to avoid them)
