This. You need a key in order to remove/replace the cylinder.
All SN95s originally came with two sets of keys, of which, both sets matched, and could be used on any keyhole within the car, such as: doors, trunk, glove box, and ignition. Remove the door card, and then remove the door lock. Take that lock to a locksmith, and have them cut you a new key. If you want it to be OEM, you’ll have to provide them with factory blanks. If they ask, it doesn’t need to be programmed. It’s a 1994.
If, for some reason, you had two keys, one completely different for the ignition, as the door key did not fit, this means a previous owner already swapped it, and didn’t rekey it. Which is a shame, because if you take the old lock cylinder and brand new lock cylinder, they can swap keys for you, so your new replacement one will work with all your original keys. I think it was $20-40, but call first, because apparently not all locksmiths can do this, even if they had previously done so in the past. (It rarely comes up).
Anyway, if you had two keys, because only one operated the ignition, remove the paneling from the bottom of the steering wheel column that is under the ignition cylinder. I honestly don’t remember if it requires a torx head or Phillips driver, or if you can even see it once removed, but the hope is that you’ll be able to see enough of the cylinder to determine what brand it is, and possibly locate a number, which can then tell you what key to order (which requires contacting customer service for that cylinder). The idea is that you can order a matching key for that exact keyed cylinder, versus some random one off a shelf.