Just a normal steering-pedal lock.

Safety is always just additional precaution/deterrent. Std steering lock is already well known by every car thief of how to break it. Actually my common steering pedal lock is also easy to break. The best is put as many safety measures as you can, steering locks, pedal locks, even some hidden kill switch or system password like Clifford Black Jax. It's all comes down to you, how secure you feel about your car.

So far for my Swift I have 2 additional locks actually, one pedal to steering and another is steering to dashboard. Both are common locks but if someone wants to steal mine then he will see that he needs to break 2 more additional locks hence might increase his risk. Hopefully that's enough to deter them from choosing my car and instead steal other people's car which don't have those additional locks. It's all a game of risk.

Invest in safety and security is better. But up to you, got budget then up to your preference. A 12 years old car need to take care on its wear and tear part and do the necessary replacement first.