You have to listen to the imam.
This is not permissible
Assalamu alaikum, This is not permissible.
Wa alaikum salam wa rahmatullaahi, This is permissible.
Wa alaikum salaam Yes, this would act as both.
Wa alaikum salam, This is permissible as long as you pray each prayer on time in congregation. Taraweeh is not mandatory.