Does TCAS II equipment satisfy the required ADS-B installation?
TCAS II and ADS-B are two entirely different systems, with entirely different functions, and they have different regulations. Having TCAS II installed &amp; functioning does not satisfy any of the ADS-B OUT mandates. 

ADS-B regulations European Union

For Europe, the regulations for ADS-B are published in the surveillance performance and interoperability requirements Implementing Rule (SPI-IR), Commission Implementing Regulation (EU) No 1207/2011, amended by Commission Implementing Regulation (EU)  No 1028/2014 and Commission Implementing Regulation (EU) 2017/386. 

TCAS regulations European Union

TCAS II, version 7.1 is regulated by Commission Regulation (EU) No 1332/2011 amended  Commission Regulation (EU) 2016/918.