Something you have attempted prior to this has crippled your XP install and/or wiped your data.
If the repair install does not show an existing XP installation to fix than your data is severely corrupted and/or gone.
Recovery Console GuideThese are Microsofts instructions on using the Recovery Console to try and repair a corrupt XP install.
The 2 commands you want to run are fixboot and fixmbr.
You will need an XP CD for this...your laptop CD won't work.
Once you have loaded the RC ( it will be a command-prompt black screen ) at the prompt type in fixboot and hit Enter.
Remove the CD and re-boot.
If the machine still does not boot up repeat the instructions to load the Recovery Console but at the prompt this time type in fixmbr and hit Enter...you will recieve a Warning...choose Y or the yes prompt.
Again remove the CD and re-boot.
If neither of these get the laptop back to where it will at least start then the another option is to get one of these:
This is a laptop to IDE adapter. You use it to hook up the laptop drive to a desktop as a slave to see if you can retrieve/copy and burn your data to CD/DVD.
It may be time to start considering a regular backup strategy. Unfortunately you are already at this point but i wish you the Best of Luck.