About transfering data from camera to pc

Windows Movie Maker is a free program that comes with windows XP SP1-2

it can also be downloaded (just do a search)

OK. To transfer the movie to your computer you need the following.
A "firewire". It probably came with your camera, look up the manual to identify it. If not buy one, they are only a couple of $$$.

The firewire plugs into your camera (behind one of those "little doors" on the camera), then into your computer. You must have a firewire connection on your computer. If it is modern then you will find it there, if it is older then you may have to buy a firewire card. They are available for either PC or laptop (provided your lap top is reasonably modern).

You then need to install and start your NLE (Non Linear Editor) in other words a video editing programme. Panasonic usually includes one with the camera. If not then you will need to buy one as Windows Movie Maker, that comes with Windows, works OK but is a bit limiting, but if you want to use it.. go ahead it will work OK.

Failing that if you are a beginner the i would suggest Pinnacle Studio 11, it is easy to learn and until you get more advanced it will do everything you want it to do. Just don't "rush" the programme, if it wants to wait and work, then wait with it!.
Adobe Premiere Elements as a medium experienced user is good and sets you up for its big brother Premiere pro (which is what i use) Other than that, Sony Vegas or Edius. There are lots of very usable NLEs out there, just chose one and learn it.

With the camera and the computer connected via the firewire, Read the NLE manual and learn how to capture to your NLE. Then "voila" your video is in the NLE for you to edit it with. Make sure you have enough battery power to take you through the capture process, or hook up your camera to the power cable that came with the camera.(best)

Please forgive me if I have been too simple for your level of knowledge.