I went to my local parts store and bought a set of spark plugs. They are NGK BKR5EGP's. But when I went to install them, I found a warning sticker to not use single ground plugs. Only multi ground plugs. Did the store sell me the wrong plugs? or will they work? I think I am going to go back and ask if they can get some Denso K16TR11's instead.

Also, a plug wire set is only 3 wires correct?

And when I look into the coil pak plug cap, all I see is a little spring. Is this right?

Thanks...

 

For your 4runner for NGK you want BKR5EKB-11 or Denso K16TR11. So yes, you were sold the wrong recommended plugs.
You should use dual ground plugs. However some people run single grounds with the irridiums, and etc etc.
Stick with the proper NGK or Denso's and you will not have any issues.

 

Yes, 3 wires are in a set since it utilizes the coil packs. Now when you change your wires go with either NGK or Denso (general consensus) once again.
I prefer going with the toyota ones since they come with new clips and wire dividers, making life easier.