He should have no problem on Star Tours, as long as he doesn't have motion sickness issues. Each person has his/her own seat and seatbelt. That's pleanty to keep you in place for ST.
As you exit the ride, there is a full Star Wars gift shop called Tattoine Traders. You actually need to walk through the gift shop to reach the park again, but you don't need to ride ST to check out the items they have for sale.
Don't forget to check out the speeder bike across from ST for a great photo opportunity.
You won't find any of the characters roaming the parks (unless you visit during Star Wars Weekends in May and June), but you should see Darth Vader and a few others featured in the afternoon parade.