rednekcowboy, you may want to read this article, it helps explain why we calibrate and why sets are not calibrated from the factory.http://www.tlvexp.ca/2011/12/why-tvs...-from-factory/
There are several other articles on Michael's site that are rather informative as well.
As you read and learn you will understand that calibration of a display is not a NEED, it is a Want. Most folks like what the industry provides from the factory and don't really care about what shade of white the Toyota commercial background is. They own a $600 TV and would never consider spending $350 to have it calibrated.. Then there are others that do care about such silly things as this..
You mention different tools, well yes, there are different levels of calibration completeness. You can do it part way with a DVD/BR calibrations disk that provides patterns to help you set the user level settings such as brightness, contrast, sharpness, overscan, main color and Tint
Or you can go to the next step which requires significant investment in Software and meters to perform a proper Gray Scale adjustment (setting white to D65)
If the set has Gamma adjustments you use the same meter and software to choose the best preset for the room environment and make detailed adjustments to the Gamma Curve if the display has the needed tools that work correctly.
If the set has a Color Management system and the meter is of significant accuracy you can also adjust the location of the primary colors so the match the 709 HD spec. The targets of all these settings are set in stone as a published spec that everyone in the industry should follow. So when the director picks a color for the rug in the room, you will see the color he picked not a pinker or oranger shade.
So as you can see, it is a Want and not a Need.. who cares what the rug looks like? Well, a lot of people.. but then a lot don't really care one way or the other..
Until you have watched a properly calibrated set for an extended period of time, and then walked into a store selling TVs, you will never really understand the obsession for perfection we all have here.
Here is an older article that is actually what got me interested in this from the beginning and my be helpful to you.http://www.curtpalme.com/forum/viewtopic.php?t=10457
Unfortunately there is a lot to this and it takes some time to absorb it all and understand it all.. many hours of read.