Swiss International Airlines - BKK ZRH

Good day all

I bought a biz ticket (J) using the Swiss site.
I will fly on TG metal from BKK to ZRH and thru to AMS on LX.
1. In BKK do I check in with TG or with LX?
2. In ZRH which lounge can I use to wait for my AMS flight, also in J.

Sorry if question has been asked here before.

As it's on TG Metal, you should check-in with TG in BKK. In ZRH, you'll arrive at E Dock. Take the Heidi Train to the Main Terminal, pass through Immigration and Security, then go up two Flights of Escalators to the Swiss Senator Lounge (the designated *G Lounge). It's right beside the C Lounge, and ideally situated for A gates, and just a short walk from B gates. Your AMS Flight will leave from one of these two areas.

Thanks for info.