Can you please suggest me on acceleration with auto transmission?

spark plugs, wires, and a hot coil will help. A thinner oil will also help. Smaller tires will also help some, although they will throw your speedometer off. Intake and exhaust will add a few more horsepower by letting the engine "breathe" easier. If you want to go even more into it, a bigger throttle body, with aftermarket intake manifold, and bigger injectors. You could also reprogram the ECU.