I will help out as much as I can. You don't need a provider, the endless number of commercials pay for our free service. If you want to watch any of the cable channels you will have to get Directv or DISH network for your provider. This will allow you to be able to pay a monthly service fee to watch the commercials.
If you don't have a satellite dish then you probably won't want the satellite service.
The newer tv will have a better reception than the older ones, so no, it is not true that you will get less channels. If you have an old antenna (aerial in British terms) you may want to upgrade your antenna to a stronger one but the older one should work just fine.
And yes, the newer tvs have guides that you can access from your remote.
One more thing; you can not watch the tv when you are driving. And because you will be driving on the right side of the road with the steering wheel on the right, we want you to be extra careful out there. And don't forget the Irish.
Hope this helps.