I stopped playing a long time ago, but I have a lot of items to sell. Is there a way to list all of my items, orbs, currency, etc?

premium stash tabs is the way to go bro

Google for "TFT bulk selling tool" (its github page), it's 100% legit and safe as it reads only your online data over browser (similar to filterblade, you need to authorize access to your poe account online, mainly to your stashes), it then reads prices from poe.ninja and auto prices your items too. Very helpful tool

If you don't have premium tabs, you can always list items in a shop thread on the official forums. This can be a slow process as you will have to list items 1 by 1.
There are some automated tools out there , that will help you list a full tab at once price , and then overwrite specific items in a tab ect.