After doing some research, I find that our thread pattern is 12Mmx1.5. So I got that. What I want to know is, what style of lug nut do we need for stokc wheels? I want to get aftermarket colored lugh nuts, but after reading some info on the internet, I am not sure which ones to get. I am using 13" teta wheels(planning a project). Currently, I think I have acorn style lug nuts. For stock wheels, what style should I get? And nay brand recommendations?

Well for my celica supras i use mag style lug nuts, i bought them off ebay for like 30 bucks.
What kind of stock wheels? there are several ones, like i mentioned i have celica supras and the recommended lug nut needs to be mag style, same goes for ae86 snow flakes wheels...

mentioned it in the psot, teta wheels, the stock 13" wheels

they are flat style. Any lug nut brand recommedations? I'm not sure on the color yet, but I know I want somehting dark metallic

The proper term for mag style lugnuts is shoulder lug nuts and I'm almost positive that's the style you need on tetas. It's very easy to tell, just look at the seat. Is it flat or is it countersunk? If you've been running acorn style lugs on it, the hole may be damaged and appear to have a countersink in it now. Just take a shoulder lug and see if it slides in from the back side of the wheel. If it does, that's a shoulder style wheel. Note I said back because the front will be damaged from running acorn lugs and it won't fit anymore.

http://www.ebay.com/itm/24-TOYOTA-OEM-O ... 7b&vxp=mtr

I take it these are cool then? My car now has acron style lug nuts, only a little bit of scratching on the wheels.

Yeah but that's for 24 nuts, see if they'll just sell you 16 and save some money. I haven't been able to find any cool looking shank nuts like these, since they are the same thing my SSR MK1's use.

I was actually thinking about ordering these for the lug nuts
http://www.colorlugs.com/

maybe a good solution for you carbd7age?