You would be shocked at the replacement cost of the entire ignition switch assembly – you don’t want to break that. If you remove the lock cylinder from the passenger door a locksmith can use it to make a key – I almost had to do that a decade ago and the locksmith was asking $35 to make the key.

However, it sounds like you don’t want to do more than start the engine. You can do that by removing the ignition switch from the cylinder. See the first source for a pictorial that should be close enough to what you have (it’s a 1990 Accord). Once you get the switch loose you can operate it with a screwdriver to start the engine.