Your question is so broad, that it is impossible to answer it in a few lines.
As in any payroll, when you f=go to IMG->Payroll->International Payroll, there are several group headings e.g., Legacy data Transfer (LSMW), Basic settings (for payroll area, w/t's), etc.
Provided your blue print is complete and signed off at least for personnel admin and payroll part of requirements, you need to go through each step and complete the config in Dev config client. .
I'd suggest you go back to your Payroll Config guide.