Transfer time from Jakarta international to domestic airline. How many hours is enough?

I am arriving around 7:30 AM on a Sunday with Singapore Airlines, and I need to clear immigration and customs, access an ATM and head to another terminal. 

There are Lion Air and Super Jet flights at 10:55. Can I make either or both of those?

Does anyone have any recommendations on ATMs and were to buy a phone card for 30 days?

Thank you.