1.) It literally says "see below for rules on resolving cards", and there is NOTHING below or on page two explaining that.
I just assumed it's referring to the "End of the Game" section in the main rulebook, where it discusses how to gain VP when revealing character cards.
EDIT: I just remembered, there is a section on the second page of the solo rules where it discusses revealing character cards: It is "Note 7" under the Le Roy Action table.
2.) Initial set up: Am I not able to place my own meeples where Le Roy's are supposed to go? If not, why even roll for him?
You roll six dice, and look at the colors of the three highest valued dice. Those colors indicate in which buildings you are to place Le Roy's meeples. You place his meeples in the "best places" in each of those buildings as indicated in the diagrams (nearest to the "1" spaces in the diagrams). Then you place 2 of your own in any other vacant locations of your choice.
Then, you re-roll the six dice and repeat the process, placing Le Roy's three meeples according to the highest three dice colors, then two of your own wherever you choose.
You will roll those six dice a total of three times, each time placing his three meeples first followed by your two. Finally, the last three vacant spaces are filled with Le Roy's pieces.
Hope that helps!