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The laptop will draw very little. I run an inverter that is rated at 120 watts for my laptop. I just plug it into the cigarette lighter. Works great with no problems. As for the television:
DIVIDE the indicated Watts on the label by the indicated VOLTAGE to get the amperage. Or, Multiply the amperage by the voltage to get the wattage. Remember that the initial power-up of an appliance is going to be more than the continuous draw of the appliance.
A television is between 1.5 and 5 amps. And don't forget to add the Antenna Booster at just a little less than an amp. And your VCR/DVD can be up to 2 amps.
Do a google search on "television amperage" without the quotes for related information.
In my opinion, 800-1000 watts would be sufficient to run the two you mentioned. When you start adding the lighting and other items, it may add up to more. Most likely you will be running the tv and the laptop simultaneously.
That's my story and I probably will not stick by it.
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