It's certainly possible, although he has not come out and said anything about it; and until he does, we would not want to guess. But if he did, it would not be unusual. In fact, a number of male television reporters and anchors have worn toupées (or hairpieces of some kind) over the years, because TV requires a certain "look" and baldness is generally not considered telegenic.
yes
Yes he does wear a toupee, and his son Skip is bald.
No
yes
Michael Landon did not wear a toupee. He had a full head of his own natural hair.
Yes.
Yes
Yes
yes
Yes
Yes
Yes