Is there a serious difference between Road Cycling Shoes and Triathlon Cycling Shoes?

I’m looking to get a pair of shoes and found a very nice pair brand new and inexpensive for my size foot, which is rare; however, they’re called "triathlon" cycling shoes rather then road cycling shoes, which is what I want. Is there a serious difference or will either work?

What features should I look for in good running shoes?

I’m planning on running a marathon next year, and wondering what features I should be looking for in a pair of running shoes to best suit the role, e.g. flexibility, materials?

I want my feet to be comfortable, even while running on hard surfaces like tarmac and concrete.

Price isn’t really a concern – I’d be willing to pay upwards of 100 euro, or 140 dollars for a decent pair of shoes.

What happens when you go to a running specialty store?

I’m going to a running specialty store to buy a new pair of running shoes, which I’ve never done before. I don’t like feet and I don’t want the employees to be looking at the structure of my feet and how I run and stuff, but I need a good pair of shoes that work for me because I’m starting to get shin splints. What should I do?

I need a good pair of cross training tennis shoes.?

I like to go for walks, but if my shoes don’t have the right support I get shooting pains in my shins that make it impossible to walk. Anyone know of a great pair of shoes that will help. I’ve tried New Balance and Adidas and they don’t help.

What kind of running shoes should I use?

So my knees point inward and I’m hoping to start running again. I was wondering if anyone had any suggestions for a good pair of shoes that would work well with my knees. Because of my knees I tend to roll on the outsides of my foot if I don’t pay attention, if that helps any.