I can’t give a good answer without seeing the image, but it sounds like you’re describing someone’s interpretation of the Merkhava, the fiery chariot seen by Ezekiel – It had wings, and the faces of a human, an ox, a lion, and an eagle.

Another possible explanation, is that it is a Megillat Esther (scroll of the book of Esther), which were often illustrated with images of people in costume – so fanciful creatures would not be out of place

A third possibility is that since you’re probably talking about a medieval illuminated manuscript (not an actual Torah, which is not allowed to contain illustrations on the actual text), which often mimicked their Christian counterparts at the time, and were decorated with strange creatures as artwork, alongside Biblical subjects.

If you could scan the image, we could probably give you a better answer.

Torah scrolls are always covered in a covering to protect the actual parchment. A frequent decoration on those are ‘Lions Rampant” to use the terminology from coats of arms- in other words- lions standng of their hind legs.

The symbology is arounf the tribe of Yehudah whose symbol was the lion, and the tribe that King David was from. It can also be taken as the symbol of Mashiach, or of the Jewish nation as a whole since the tribe of Yehudah was King over all of Yisrael.

here are a couple of sites showing examples of Torah covers

Because it was, presumably, from the middle ages, they might be parts of coats of arms, or simply act as decorations (Mostly because I do not recall any references to fictional creatures in the Torah).