Don't be nervous! I was nervous too, but there's really no reason to be. Everyone at ETSU was so welcoming and friendly, which helped put any anxiousness at ease. You'll have two interviews - one with faculty/community member and one with a student. The questions were very basic (e.g., why pharmacy, why ETSU, tell me about your extracurriculars, etc.).
I can't help you with airport or car rental because I drove there. However, I know of a few hotels really close to the school. Carnegie Hotel is literally right next to campus and is really nice but not crazy expensive. I personally wanted to save money and stay somewhere cheap, so I stayed at the Comfort Inn, which was like 3 miles away or something like that. It definitely wasn't the nicest hotel I've stayed in, but they have an ETSU rate of 59.99 + tax/night and have decent continental breakfast. There are many other hotels in the area - just do a quick search and you'll find them.
As far as food goes, I saw tons of restaurants in Johnson City. I only ate one meal there (besides breakfast at the hotel and free lunch at the school), but I looked for restaurants on Yelp. From my Yelp search, I decided on a barbecue restaurant called The Firehouse Restaurant. If you like barbecue, this place is great. You won't have any issues with finding food though - there are plenty of options in Johnson City.
Good luck!!!