i have a set of these alloys but am unsure as to whether I need to use flat seat nuts or tapered, i got a set of genuine flat seat and they are to big circumference wise to fit into the recessed hole, so I’m thinking tapered can anyone confirm that has this car?

 

Ask at Toyotanation in the tire section.

 

no need to go there. you MUST use proper shape and size lug nuts on alloys, or you looking at a lot of trouble down the road. regular cheapo nuts will cost you stripped studs and loose wheels. that's why proper nuts for alloys cost so much.
been there, done that, learned my lesson. alloys DO NOT LIKE anything but proper lug nuts.