A:AnswerYes
The TV has a standard coaxial RF input for over the air TV
The manual can be found here if you need additional details
https://www.samsung.com/us/support/owners/product/2019-qled-tv-q50r-series
A:AnswerYou have options, you can utilize an over the air antenna or if you have Wi-Fi you can connect to utilize the built in App subscription services-HULU, NETFLIX etc. other than cable or in addition too
A:AnswerCable providers give the cheapest HDMI cables made. If your getting this tv you might as well get a nice 4K hdmi cable. Unless the only thing your hooking up is your cable box. Might want to confirm your cable box displays 4K otherwise you should be fine with what they gave you.