You can get the free Color HCFR software that you will see a big thread about (version 2.0 just came out).
For calibration disc you can get the Color HCFR patterns disc (free) or the Get Gray disc ($25) both of which will do SD-DVD.
If calibrating HD DVD or Blu-Ray you can get the free AVS HD test patterns disc that there's also a big thread about in the calibration forum.
For a sensor you can get the Eye-One Display LT sensor, there are several sources, this is one of the cheapest;
https://www.digitalgraphicsresources...ROD&ProdID=865
You will need to install the software on a laptop, manually move the driver file for the sensor into the directory that the HCFR is installed in before you can take measurements.
You need to read the threads cited above, especially the bigger thread on HCFR software and Tom Huffman's beginner guide to calibration stickied at the top of this forum. Calibration is involved, but I was able to teach myself how to do it in about 4-8 hours and the people in this forum are very helpful for helping you get started.
If you're not technical minded then you can always buy a package like "SpyderTV" which comes with a sensor and test DVD and is basically idiot proof. You won't get the kind of results you can get from a better quality sensor and more sophisticated software though.
If all of this is overwhelming then pay for a calibration and watch how it's done. From that you can make a judgement on if it's the type of thing you would be willing to tackle on your own.