i bought the kit from acura but i have the pearl white so how do i exactly apply the touch up? i have 2 pens that they gave me

 

One's a base coat (the white) and one's a clear coat.

If your chip/scratch is deep enough so that it's no longer white, you'll need to apply the white first, then the clear afterwards. If it's a light scratch and you still see the white, you can skip straight to the clear coat.

Note that these aren't detailed instructions, so please do more research before attempting.
For each application, whether it be base or clear coat, you will need to let it dry and wet sand it afterwards to make it flush with the rest of the paint. You will need to do this many, many times until you are satisfied with the look. You switch from base to clear coat once the scratch/chip is sufficiently filled in with the base coat (i.e., it's all white).

Check out some YouTube vids on how to do it properly. It will likely not look like the scratch/chip was never there, but if done correctly it will be very hard to spot.

 

Rock chips are something I have a lot of experience with. Here's my advice if you're looking to fill-in rock chips, found primarily on the hood.

1. Shake the paint up very well.
2. Have wooden tooth picks and a paper plate at hand.
3. Drip a pinky-nail sized drop of paint onto the plate.
4. Dip the narrow end of the tooth pick into the paint.
5. Center it over the crater aka rock chip.
6. Allow gravity to pull a small drop of paint into the crater.
7. DO NOT fill the crater to the top, just one drop to cover it.
8. Allow it to dry for a day or two.
9. Repeat process above 2-3 times until rock chip is filled.
10. Cover it with a few coats of the clear, spread out over a few days.
11. Leave it alone for a week.
12. Add a coat of wax.
13. Above will need to be re-done sporadically, as most go to car washes, where they scrub the hell out of your paint.

I use tooth picks. I never use the 'pen' or anything the touch-up paint comes with. The thrust here is do not fill any scratch 100% in one application, as well as shaking/mixing the paint very well, and consider tooth picks for all scratches and rock chips.

 

This. I didn't go into the fine details of how to apply it, but generally speaking the paint brushes/pens are a nightmare to work with if you want a clean application.

If you want it to be as smooth as possible, you'll likely need to wet sand the affected area when you're done step 11.

 

I also have the same color...

how much does it cost at a dealership??

 

I think most dealers (at least the ones I've dealt with) will just farm it out to a body shop they work with.