Other than washing eggs, I agree with what Southernchick said. Eggs are coated with something called "bloom". This helps keep bacteria out of the egg. The egg shell is porous so the developing chick can breath. If you wash an egg, you remove this bloom. Also, if you put an egg in water colder than the egg, the egg will absorb water and any bacteria in the water. If you plan to store the egg any length of time or incubate the egg, it is best to not wash it. If it is dirty, just try brushing it off. If you are going to eat it soon, you can wash it.
1.Should we put the Rooster in w/the ladies?Some one told us not to if we were wanting eggs to eat.
There is no difference in the taste of fertile eggs or the how long they will keep. Hens will lay eggs whether a rooster is present or not. Unless you really want a rooster or plan to hatch the eggs, you may not want to feed an extra chicken.
2.What should we put there water and feed in if we keep the feed and water outside instead of in the coop.
Do a search using the search feature. You'll get many different ideas. This site has some.
https://www.backyardchickens.com/forum/viewtopic.php?id=109158
3.What can we feed our chickens?
There are a few variations, but the normal progression is starter until they are about 6 weeks old, grower until they start to lay or 20 weeks old, then layer ration. This site has a chart on treats that can be fed to chickens. I've seen recommendations that you don't feed more treats than they can clean up in 10 to 20 minutes to help keep them ona balanced diet. In my personal opinion, it won't hurt them but it might make them less "efficient" in egg production as the diet is not scientifically balanced.
https://www.backyardchickens.com/web/viewblog.php?id=2593-Treats_Chart
4.Do they have to have hay or straw?
You can use many different things as litter. Hay or straw tends to mat together and it makes it heavy to clean out of large coops. It is better if it is chopped first. Some people use dirt floors and some have droppings boards under the roosts that they clean off daily. It depends on your coop and your poop management plan as to what would work best for you.
5.How big should their nesting boxes be?
You can get a lot of different opinions on this. I think the minimum recommended is 12"x 12" for a single nest. I saw where someone said a 2' x 4' community nesting box would handle 35 hens. I made mine 16" x 16" with the thought that hens often like to lay at the same time and the bigger nest may reduce the chance of them breaking an egg if they are crowding in.
6.Should I leave the coop door open all the time or close it at night?
It is easier to predator-proof a coop than a run. Usually, if you lock them in at night, they are safer. If you feel your run is secure, you don't have to lock them up, but I think your risk level goes up. Purely depends on your confidence in your run and your risk tolerance.
7.What time should I feed and water them?
They need free access to water from wake-up to sleepytime. Chickens drink a lot of water and lack of water will cause egg production to drop. Chickens do not eat meals. They will gorge themselves on some treats, but they snack all day long. They need access to food during daylight hours. Food is not as critical as water, but it is important.
I suggest going to the Learning Center at this site and reading things at random. Also, go to any of the hatchery sites and see what they say about preparing for and taking care of the chicks. Most of them have very good information. You can also use the search feature at this site for specific information or post a question.
Good Luck and welcome!!