1) Contact Toshiba support. They can probably supply a recovery CD at the very least; maybe your machine came with a recovery partition and they can talk you through it.
2) If you have a bootable recovery CD, or a valid XP cd, there are ways to build a bootable pen driver but ONLY IF the pc supports booting from USB. heck, if it boots from USB, you could borrow a USB CD driver from someone.
So there are two steps. The first is to have recovery media: a recovery disc drom Toshiba or a good XP distro with a license. Once you have either of these, if you can't get your hands on a USB CD drive you need to build a bootable pen drive. This will require that you borrow a working computer to build the bootable media, using some tool like this: http://www.techtipsgeek.com/install-windows-from-usb-flash-pen-drive/559/
or one of the other techniques here (on Tom's) http://www.tomshardware.com/forum/50282-34-tutorial-installing-home-professional-flash-drive