i have required info about transmission oil change in prius c name aqua 2013 odo 120k ?

For the Prius "c" Trans,

You need to jack up all four corners of the car. You need to have car level to do the job correctly.
First, loosen the fill bolt, to make sure you can fill after emptying.
Second, loosen the drain bolt and empty out the fluid
Third, replace the drain bolt and torque, then use funnel with a hose placed into the fill hole.
The "c" should take 3.5 qts (not sure on metric) of Toyota WS fluid
When full, it will basically start to overflow that fill hole.
Then you can hand thread the fill bolt and torque tighten it.

You will need the 10mm hex bit or allen socket for the plug

I did take as short drive before changing mine, but I dont think there is any certain temp necessary.

Hope you can understand this enough to DIY

 

What are the torque specs?

 

I'm not sure, but third gen prius drain and fill bolts are both 29 ft/lbs. Get a proper allen key style socket, that can be snapped onto ratchet or torque wrench, 10 mm hex.

I haven't found a Prius c Repair Manual yet, fwiw.