Question 3d pinter Extruder and control board

Dear, All
I have a 4-axis cnc controller and I want to change it as a 3d printer I want to buy a Extruder to be suotable with my controller which work with 3A two phase 57

my questions:
Which extruder be suitable?
Is it work if I connect it with A-axis in MACH3 ?
Which type of Extruder Controller Card to control the tempertature and other devices?

Thanks a lot