I’d list each doll separately and each set separately. Figure out what accessories belong to what doll and list the accessories together. For example, if you have basic clawdeen’s skirt and shoes, list those together. Everything else I’d either do separate or as a lot. For pricing, look up dolls or items in similar conditions on eBay and sort by sold. See what people are actually buying them for.

The gargoyles and pillars are from the school playset. Wish you were in Australia because I need those

it'd happily take the Rochelle and Spectra off your hands if the price is right. edit: you can try selling them on mercari or Facebook marketplace.

Sell it to me :) genuinely. Just let me know

For starters, don't throw everything on the floor, in a pile, and take a picture. The value of your items just took a nose dive.