Why does it have high idle and jerks when I turn my A/C on?

Yes you need to add more fluid or replace it might be going out

check that the turbo is fully operational ( variable vanes are free to move , actuator and vacuum hose are in good condition
the smoke is an indication that it is on on the job
the high idle may be from excess fuel and not enough air
and the rough idle and jerking indicates a air fuel ratio problem back again to the turbo
If you have fault codes run them and consider putting it on a chassis dyno for a full test of the pump and turbo

A stuck idle speed control motor ! Tap it with a wrench or something similar , You'll find it located on the throttle body ! Ford IAC valve test how to adjust minimum idle speed

i changed mine took to 3 shops last one said computer i would take pos cable for 30 sec turn on to acc and tap post 3 times if it helps

the idle RPM is too high
or its just too cold,
how cold is it outdoors?
idle speeds cold can be about 1500 RPM/ cold.
and will ****.
it jerks because you are taking 0 torque from engine
and the sending that to a stalled rear axle.
this cause a ****, that is why the park lock out requires Brakes on
so yo dont run over things.

Ford Idle Air Control Valve Diagnostics High Idle DTC P1506

Advance or Auto Zone will scan it for free. Go from there.

When the aircon is switch on it puts a substantial load to the engine: you need to get your car tuned to take into account the load from the aircon. Most car have a mechanism that increases the idle speed when the aircon is active: if you are unable to get your car tuned yet, try making the engine idle speed slighty faster while you have the aircon turn-on (the ajustment screw should be close to the accelator cable connection at your engine end). Don't make the idle speed too high and check by turning the aircon off and on to assess the best compromise idle speed to stop your car from almost stalling (e.g. jerking).

Good luck!

seems it cuold have a trans problem, but first, how is the motor running? is the idle high? if so it will ****... if idles low then you have a trans. prob...

distributor is advanced