Nope Bro. AT and CVT are 02 completely different Transmissions, so accordingly, they require compatible Transmission fluids.
First confirm that whether your car is AT or CVT? If it's CVT, then you should never, ever pour ATF in it's Transmission, instead you should go for compatible CVT oil from Toyota.
Regarding prices, I have no idea. Iss k liay aapko market visit karna paray gee. Same Toyota Genuine oil if you buy from Toyota dealership or market, Toyota dealership price will definitely be on the higher side as compared to market, but cheez 1 no. Honay ki guarantee hai.
For Liqui Moly, you may Google regarding their authorized dealers in Karachi. You can buy directly from them, irrespective of price or going through market hassle.
I hope, it helps. Thank you.