Yes it is cable ready. I use it on Cox cable. (you will need the cable box for scrambled movie channels)

I was able to hook it up to my cable. I have Dish and use a cable for the extra tvs in the house. I hooked it up to the ant/air outlet. Tell the salesperson what you have and they should be able to help.

guess it was cable ready shes using it

It is cable ready, although you may need an antenna to get more channels depending on the type of service you have.

This is the setting I used from a Reviewer on Amazon.
Decent Small Television (Review of 19"), September 3, 2013
By MechanicalMan (Springfield, MO) - See all my reviews
This review is from: Samsung UN19F4000 19-Inch 720p 60Hz Slim LED HDTV (Electronics)
I calibrated a 19" F4000 for my father yesterday with an X-Rite Colormunki Display colorimeter. These are the settings that I settled on:

Mode: Movie
Backlight: 12
Contrast: 100
Brightness: 44
Sharpness: 14
Color: 50
Tint: G47/R53
Dynamic Contrast: Off
Black Tone: Off
Flesh Tone: 0
Color Space: Auto
R-Offset: 24
G-Offset: 23
B-Offset: 23
R-Gain: 34
G-Gain: 32
B-Gain: 30
Gamma: 0
Motion Lighting: Off
Color Tone: Warm2
Size: Screen Fit
Digital Clean View: Off
MPEG Noise Filter: Off
LED Clear Motion: Off

Should be able to..... all you should need is a wireless connector!!

no

The 19 and 22 inch sets use a small power supply in the power cord.
The jack on the back of the tv set says DC 14V. It might work okay with 12 volt dc from your cigarette lighter. In fact, the car battery is often 13 to 14 volts when fully charged. I would measure the output of the power cord and check the polarity (is the center pin +14V or -14V with respect to the outer sleeve of the power plug?)

Dunno if I like the idea of watching TV while driving a truck -- if that's what you had in mind. But this model has "offshored" its power supply to a wall-wart unit, which plugs into the back of the TV at a DC socket labeled "14V DC". So you might actually be able to power it directly from an accessory socket on your truck, if you get the right cable, without the AC power supply.

In any case, answering your question, the set uses about 20 watts (as measured at the AC socket). So maybe a little less if powered directly from the vehicle's DC power. Good luck with the setup!