There's a short, yet comprehensive, answer: No.
You buy a working laptop (most come with Vista, nowadays, but you might be able to find one with XP if you do a good search or find a local shop - the one with me still has them custom-built).
Then you reinstall all applications you want from the original setup. Some might not be Vista compatible, and you might need to download or even buy newer versions then.
Then you copy all your personal data. For this amount a USB-stick might be the easy way.
Windows XP Professional version 2002 SP2 - Intel 701 MHz - 76 gb total 64 gb free. I am thinking of upgrading to a laptop and want to know if it is possible to completely copy my system, files, etc., from my current pc without having to reload anything. If it is possible, how do I go about it?
I look forward to hearing your advice.