So can I share something that is working pretty well for us? We've only got the one toddler, but he's the first grandkid on BOTH sides so we're overflowing with toys. I spent one evening a month back sorting and organizing the toys. After throwing out unloved and broken ones (he was sleeping), I got out a box of gallon bags & put all the toys by type into those. Now all his toy cars are in one bag, his duplo have their own two bags, megablocks in their own box, all toy food together, all wooden blocks together, etc. Pieces that go to larger sets are all bagged together in gallon or quart bags and nearly everything is in a toy box in our second room/office. There's one tub of toys for the living room with stuff he likes to play with daily. This makes enforcing one toy group out at a time much easier for us! I've woken up several times to a mostly clean living room floor!!!
(and bedroom floor now that we all have our own hampers).
It's a big step forward for us! Hoping we can keep it up!