A:AnswerYes for this product you can. what I did is hooked it up to my lcd/hdtv. I love that I did not have to use any apps or downloading. you can also connected to just a computer monitor. The dvr does the recording. the monitor or tv is for reviewing it.
A:AnswerIf you have the 8 channel model you can connect up to 8 cameras. From my understanding it is plug and play. (It was on my 4 channel)
They do sell individual cameras and longer cables. (100")
A:AnswerUsing Windows multiple displays, it's possible to have the video feed on another monitor or have two monitors display the same feed. Video can also be displayed using HDMI.