Interior Furniture Set - Interior Collection 20 Models - Cycles and Octane
CTRL + C and CTRL + V into your scene should work :)
There you can find these items every one of them has a separate folder. 
if you are interested in vertex count:
ABSTRACT LAMP: 137 487
ARMCHAIR: 335 553
BAR CHAIR: 2 600 (without modifiers)
BASKET: 7 258
BED: 789 349
CABINET WOODEN: 1 792
MARBLE TABLE: 3 292
GLASS COFFEE TABLE: 11 315
GLASS TABLE LIVING ROOM: 1 552 (without modifiers)
LAMP (BUBBLES): 418 321
OFFICE CHAIR: 64 607 (without modifiers) / 586 286
OLD TABLE: 45 000 (without modifiers) / 717 000
STOOL: 7 886
TABLE: 14 408
CHAIR: 4 332 (without modifiers) / 19 400
TOWEL RADIATOR: 26 000 (please note, that emission number in particle system is 0
and should be at 35 000 to achieve a result as in render, but
is turned off because of the size of the file)
TREE SHELF: 1 048
WASH BASIN: 7 940 (without modifiers) / 66 867
WATER TAP: 4 452 (without modifiers) / 41 253
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