I wondered that also. At least in the US, it seems the hospital will provide you with a walker or crutches, and insurance pays for that. They may give you other odds-and-ends like a toilet riser or that big foam pillow between your legs. Most other stuff, you are on your own, but likely an "Occupational Therapy" person will show up to sell you things like grabbers, etc. but at a much higher price than you can find it elsewhere.
I bought a bunch of stuff before surgery, but never really needed much of it. I used a sock aid, a long shoehorn, and added grab bars in the shower, and toilet risers. And I use a cane now and then for longer walks. You probably want a toilet riser on several toilets if you have more than one. I used a grabber a bit, but I can pick things up off the floor by putting my surgery leg behind me. If I was 70 or very overweight, you might want more helpers.