If I see someone wearing these can I beat them?

Yeah, sure but I'm sure you'll be at a disadvantage. Those that wear these foot gear will have an advantage in fight or flight scenarios. Fighting is best done with bare feet, or full articulation in the feet and legs. And running is more efficient and fast when barefoot. Unless you are barefoot during this exchange, you might get a round house kick that you couldn't see coming. Have a great day.

I have an old pair of 5 fingers.. in between the toes wore out.. is that solved here? .... Also , im 10.5, what size is suggested for these?

Not sure what you mean by solved. Not sure what you mean by old either, but size for these shoes run small meaning if you wear a 10.5 normal shoes you SHOULD go up a size or size and a half. 11.5-12 is suggested for V-Trail shoes.

How wide are these shoes, can I order a wider size?

My foot is wide I have no problem putting them on

I have a pair of five fingers that are about 7 or 8 years old and they are a size 42. What size should I get in this model?

Hello, here is a link to the shoe on vibrams website where you can reference their shoe specific size chart! https://us.vibram.com/shop/fivefingers/men/outdoor-trail/v-trail-2.0-mens-M76.html