A:Answer1. The TV has a standard headphone jack if you can use that as input to your receiver. It also has the RCA digital output jack if your receiver can use that.
2. There is a coax connection, so it your cable provider has unscrambled channels, you can connect it directly, and the TV can detect and display them. Otherwise it has HDMI inputs for standard cable box connection.
3. Not a smart TV.
A:AnswerIt comes with a very detailed instruction sheet for set-up and assembly, both in English and Spanish. I found it very helpful and no "manual" is required. Hope this helps!
A:AnswerThis HDTV measures 14.0 inches high by 22.5 inches wide by 5.0 inches deep with stand and 13.5 inches high by 22.5 inches wide by 2.6 inches deep without stand.
A:AnswerThere is only a power button, no volume control on the TV itself.
The remote is small, black but does have glow in the dark power button, channel, and volume buttons
The remote is smaller and lighter than the Insignia Roku TV remotes
Insignia does have a product support site:
https://www.insigniaproducts.com/support