Materialwise, see what you can scrounge before worrying about plans. If you see a construction site or someone having renovations done, go up to the door and talk to the guys and you will probably find they have some 2x4s or even pieces of scrap plywood that you can take away. Pallets. Go to stores/businesses that get things in large wooden packing crates (big equipment) and see if they have anything you could have. Keep an eye on your local Freecycle and Craigslist. Etc. You may be able to score some wire for the run that way, too.
Once you've got a sort of basic critical mass of materials, then you can figure out a way of putting them together into something coopish
Toolwise, go down to the hardware store or Home Depot or whatever, and buy an inexpensive hand saw. Honest
For cutting lumber to length, and you can cut plywood with it too as long as you don't mind the squealing sounds the saw will make, get something shortish with 9-10 teeth per inch. My current utility saw is a Stanly FatMax, about $15 here in Canada and doubtless cheaper in the States, and it slices like butter through ANY kind of wood. The cuts will be a little rough but Oh Well. I mean, it's a chicken coop
Then you will want to borrow someone's cordless drill, for putting in screws. Most people have 'em, it won't be hard to borrow
Really truly, sawing and driving screws is easy to learn and an INCREDIBLY useful skill for the rest of life
Have fun,
Pat