Throttlebody hose is a no brainer.
The stock item is very unreliable.
Use quality screw clamps eg oetiker, norma or murray.
Learn to use an app like Btssm or Romraider to health check the car, especially inlet tract leaks.
Then learn diy inlet pressure testing, your car will have leaks.
The stock tmic leaks, replace with aftermarket or re-crimp it, I use parallel pliers for the job.
Chances are if you get the car working 100%, it will drive much better regardless, and be properly ready for the next round of mods and tune