Ah, okay :-) Well... I think that either blue or coral would be a good colour for a throw

I agree you can mix and match. I wouldn't match cream and white though, they conflict. Stick to either one as your background.

I personally would go with your idea of the gold & cream curtains as these will be timeless and then inject some colour into the space with the rug and cushions. Perhaps consider selecting either the blue or the coral rather than both for the rug & cushions as both are strong colours. Royal blues & corals are equally rich colours that work well with golds. You can always add one or two gold satin cushions which will tie in with the golds from the curtains & bring the whole collection together within the space. Hope this helps!

Sorry, but MATH keeps telling people that cream and white can't be mixed, but I think they can.

I don't think it will be too much, it could be lovely.