First of all you are making good decision about going for corolla instead of other local made cars,
I think you just go to showroom and give them money and take your car, that's what i did in karachi.
I don't know current price of xli but i think it is 1595000. You can search its price on pakwheels too.
No price difference in different colours.
At last just a suggestion, don't go for limited edition they are just giving a cheep gps device and a sticker off limited edition. Go for the simple xli save the money and buy some good in dash gps.
Hope i replied some of your queries.
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