My dad made me jumps out of PVC pipes... If you spray paint them, they look nice :)
I also have a little kit that we bought either at Walmart...? or a pet store? And It comes with a tunnel, a pause spot, weave poles, a jump, and a timer. Its really nice for practicing.
You can also make jumps out of wood planks, or chairs and brooms. Tunnels can be made out of long boxes that are open on each end. You can also make weave poles by using traffic cones, and if theyre the ones with the holes in the top, you can stick PVC poles in them. For a pause table, I just used a table that was sturdy and really short to the ground.
For other equip. Like the A frame and seesaw thing... :P You can look up templates on the internet for how to build them. I've never actually tried, but there are some nice ones you can make and they range from easy-ish to hard.
Good Luck doing agility Alyssa! :))