On this screen testdisk displays 2 partitions.
http://imageshack.us/photo/my-images/547/ik9y.png/
Please let me know which partition contain your data.
What you can do first;
Currently there is a windows partition in your partition table.
But the boot sector is not valid.
Might be possible to repair it.
You can do that using TestDisk / Advanced and Boot.
If the backup of the boot secor ist Ok you can use Backup BS to copy the backup of the boot sector over the boot sector and should be repaired.
Always list your data using the menu List under the menu Advanced and Boot.
Only do something if you're able to list your data.
If both, your boot sector and its backup are bad, you can run Rebuild BS to have a try to rebuild your boot sector.
If you're able to list your data, you can use Write.
Fiona