do they have restaurants, foods like popcorn, funnel cakes, hot dogs, chicken & fries, burgers, sandwiches, and drinks, toys, books & magnzines, restrooms, water fountains, fast foods, and pens & pencils there ?

Yes- there are several places in the area directly outside of the stadium that offer full restaurant sized menus and within the stadium there are more outlets for 'stadium' food like burgers, nachos, hot dogs, pretzels, etc. They have gigantic nachos served in baseball hats too. Not all food is served at each counter, so it's worth walking around to see what they have.

They have that & much, much more

Yes they do