Does it matter what clothes you wear when you run
Well you definitely shouldn't wear heels and skinny jeans. So yes it does matter, comfy clothes are the best. They have special athletic clothes that are perfect for exercise :)
Not really as long as you can move and are comfortable
You should wear something comfortable when running, if you do not you will become worn out faster.
Something that allows your skin to breathe.
You should practice running with whatever clothes you'll be wearing when you commit a crime and the police chase after you.
If you run in temperatures below 10 degrees or the wind chill is severe, wear two pair of underwear. There is no pain quite like it if you freeze the parts there enclosed. I know . Been there.