In Indonesian, is "gloves" plural in this context? Would a better English translation be "Coat and gloves"?

The correct translation for this should be "Jacket/blazer and gloves."

Coat is "mantel", a different heaviness to it as opposed to a jacket which is typically lighter. In natural conversation if you were speaking of just one glove, that would be pointed out, so the correct translation should be "gloves".

Is there a lot of call for jacket and glove(s) in Indonesia?

And didn't the lesson begin with teaching that "coat" is /mantel/. Coat...jacket... random!

I am confused with Indonesian English... They don't know or I dont know whereas in other course I dont get any problem with English