Just in case it's not a wind up

Did the breeder give you any of the feed he'd been eating? He'll need a pound of pig pellets/nuts every day for the first 10-12 months to make sure he grows well and gets all the proper vitamins.
Check what he was being fed and get some as soon as possible.
Was he wormed when he was weaned? If not, you'll need to get an injection from your vet too.
Picking him up and putting him in a harness will upset his stomach, as would a 2 hour journey on your lap - it's going to take a few days for him to recover. During this time things should be kept calm and visitors discouraged to let him adjust. Any new food should be introduced GRADUALLY so it doesn't upset his stomach.
I would STRONGLY suggest another pig for company and housing them both outside - pigs are NOT suitable house pets and as others have said, one pig will soon become lonely, bored, destructive and possibly aggressive

Has he been castrated? If not get him booked in to your vet to have this done as a matter of URGENCY. He'll be sexually mature soon and trust me, you won't want him around you when that happens. It will be safer for you, him, your family and your other pets to get that done NOW.
I think you've got a steep learning curve ahead, but if you can learn to provide him with the correct care and environment you'll have a porcine pal for life, if you don't though it's not going to work for you or your pig.