My PC is broken and would like to play LOL and I still have a laptop that is old and not really good. I can't give exact dates now, but only as an assessment
Does Lol really run on everything?
Lol definitely ran everywhere 2 years ago. Wouldn't be able to confirm that today. Even if you screw everything down. But give it a try. It doesn't cost you anything
No league doesn't run on everything. You don't need big hardware requirements, but it doesn't run on every computer (playable smoothly with at least 60 FPS)
Yes, but your PC should "only" fulfill the following: https://www.pcgamebenchmark.com/league-of-legends-system-requirements
LoL doesn't run on everything. Most laptops and PCs made after 2014 should be able to do this without problems.
Look at the surface of the laptop. If you find several stickers there, you have at least some information.
If your laptop is older than 2012, it may not work. If it was an older, slower laptop then, the chances are very slim.
Yes, LOL can even play on a programmable calculator.