Hiya Mimi,
So sorry for your losses and what you've been through. It sounds like you're getting back on your feet though!!
For a run, you'll need to use 1/2" hardware cloth to keep the predators out. You can bend it at the bottom about 18" and cover with rocks or pavers, or just bury it down is even better.
For a coop, most on BYC would discourage any prebuilt ones as they never hold the number of chickens they say they will, maybe half, and they do not last like stick-built ones. You could try watch for a shed on Marketplace, or if you're in a state like here, an ice-fishing shack would work too. Otherwise, on BYC there are oodles of ways to build a coop, and make one that's predator-proof.
https://www.backyardchickens.com/articles/categories/chicken-coops.12/