[travelling to osaka-kyoto]

im going to osaka on january 2020

im not sure about the train line in osaka

i will arrive at KIX around 9.40 , and will stay at namba area. (not sure where yet)

so if around that time, what kind of train should i take from KIX-namba? 

i am travelling with 2 years old son.

and should i buy icoca card for my whole vacation there?

[Suica Card to use for Nankai Line Osaka]

can i use icoca card for nankai line?