gaijin
GOLD Star
Regarding the lugs (which I will replace at some point) , these may be the “wrong style” but they are perfectly safe. Toyota’s installed these here. The lugs are conical seat with the correct threading and length, they just done have the splined ridges which is just protects from theft better.
I don't really care whether the lug nuts are splined or not. What I do care about is the mating surface with the wheel.
There are two kinds of mating surfaces used on the conical seat lug nuts, the first is without a rotating mating surface like these:

The second is like the lugs designed for the TRD RW wheels which have a rotating mating surface:

The rotating mating surface is designed to avoid chewing up the forged aluminum wheel every time the nut is tightened or loosened.
My guess is that the lugs you have are like the first type, i.e. no rotating mating surface.
Will yours "work" for your application? Sure (assuming the mating surface is the correct angle), but not as well as those designed for that wheel.
HTH