I'm currently running 16x 6.5, but looking at going back to a 15x7 at little later, mainly due to a the look I'm trying to achieve.
clear side indicators i do believe people use the ones off of the VT/VX commodore.
the only other grill you can use is one of the 89 - 91 hatch/sedan like in the picture below which is a straight fit.(and before you ask, yes its my old car)
or if you could go with the FXGT look which requires removing the filler panel under the headlights then changing the the bonnet/headlights/grill/front bar and quite possibly the front gaurd to look like below, not an easy task considering it would require painting but its still an option
the above options are a few that are available using genuine parts from either a corolla or nova(rebaged corolla) (sourcing the FXGT grill would be the hardest item to find)
hmmm white on a green car not feeling it, plus you could be forever cleaning them so they stay white.
i personally would stick with the black with the polished lip.
buts these are only my opinions, its ultimately up to you what you do with your car, just so long as your happy with what you and how it turns out.