Your recovery partition is probably hidden.
If you had the choice of 32bit/64bit it should be possible to get back to that choice.
See if this tip from Google works for you.
To access the Toshiba recovery partition, power off the laptop. Hold down the 0 (zero) key and turn the laptop on.
Keep holding down the zero key until the TOSHIBA logo appears, where you should start tapping the zero key repeatedly.
Stop if the unit beeps or when the TOSHIBA logo disappears.
The screen should flash ** HDD RECOVERY MODE ** for a split second, then load the Toshiba recovery program right from the hard drive.