The discovery of the old abandoned power station has taught you something useful this time: electricity. And remember that phrase from Mr. Nikola Tesla found on his smartphone: "My only regret was that I didn't invent the laser gun." That gives you an idea. That's right! Why don't you make a laser gun? What ingenuity! You who look so smart to me, what are you going to do with the electronic parts, the electric wires, and the junk that you will find by searching the houses? Batteries. Tesla couldn't have said it better.
The bare minimum, as far as gear goes, includes just enough to survive. What the means is up to you. If you read the popular book Hatchet, where a young boy experienced a plane crash and only had a hatchet to survive, you know a lot can get done. However, you can pack a lot into a small backpack to use for bushcraft and wilderness survival. Common tools include: Solo Survival: How to Survive Alone in the Wilderness for 1 week --Eastern Woodlands