He doesn't have a BPV hose, he's NA.
1. It is worth a try. It may or may not work, but either way should be good for your engine.
2. I usually do both methods.
3. I have seen people use the Brake booster hose, but whichever one you use, make sure it is close to the center so that the seafoam goes into all cylinders. On your car you can acctually run a hose directly into the throttle body by loosening the intake and sliding it inbetween. Don't take the intake off completely because it will through the MAF completely.