Since you have no experience with calibration I don't think it makes sense to spend money yet.
A lot of theory has to be learned and this takes time, it doesn't make sense to jump right into it in total ignorance.
I'd suggest you download the AVS HD 709
calibration suite and learn the basic calibration first, it's a free download.
Take a look at this tutorial
, just follow the steps.
This might be enough for you to be happy with your TV.
As you learn more you should realise that you'll have to decide if you are willing to take calibration as further as possible or if you are satisfied with the basic stuff.
You have to ask yourself if it's worth to endure the immense learning effort and spend money just to get white balance, Color tracking and Gamma right.
On the first post of the "Cal video
" topic you'll find a very good introductory and educational video about calibration, it's only touching the surface of advanced calibration though.
You have no idea how much you have to learn, but you can learn most without spending a penny.
EDIT: Just realised the OP is another member, but this applies to him as well.