Do I need to know only the vocabs listed as glossaries or any terminology in the textbook is examinable?
Any terminology is examinable.
Are the 1500 ish glossary in level 1 just for level 1 or for the entire CFA curriculum?
Each level has its own glossary; there’s some overlap, but they’re different.
so what is the combined number of unique glossary in the entire CFA curriculum?
I don’t know.
But I think that you’re focusing on the wrong thing.
Concentrate on passing Level I; forget about Levels II and III until you’ve done so.
Sorry, mea culpa.