Maybe I can help!!!! By looking at the pieces, I have done some rummaging around trying to see what works well together!! As far as the dining room table goes, here is a suggestion! Since the chairs are quite intricate and bright white, I found a vintage-ish/worn wooden table that would have an interesting contest between the chairs and table!
As for a rug, I’d say that you should go with a rug with settle pattern to tie in with intricate detail on chairs! Depends on what color scheme you are wanting to achieve!!!!
Figuring out what you should get to go along with that flawless sofa can be hard to decide at times but I think a coffee table would look great! Maybe a copper or brass one would esentuate that pale pink!!! If you would like, I think you could take a coffee table and spray paint it copper or brass and then chip off some paint to make it look worn! That could be a really cool DIY!
I hope this helps and I hope it gets you thinking about the route you want to go with! I will keep looking and let you know if I see anything else that would emphasize and showcase those elements!