13 ATPL exams, and you will need to do some form of skilltest, potentially also flighttraining depending on your situation.
010 Airlaw
021 Aicraft general knowledge
022 Instrumentation
031 Mass & balance
032 Performance
033 Flightplanning & monitoring
040 Human performance
050 Meteorologi
061 General Navigation
062 Radio navigation
071 Operational procedures
081 Principle of flight
13 ATPL exams is a mandatory item for the issue of your license. Shouldn't take too long. I did mine on fulltime study, around 30 weeks, but probably you can do it quicker. however if u fail more than 3 times, you will have to do it all again.
Any EASA country can convert your license, so u can google around.