Yes, back in 1957 through 1963, we had an hour for lunch. The elementary schoolers had to stay on-campus and buy or bring a lunch from home. But middle and high schoolers were allowed to leave campus to get done whatever they needed to do. Middle schoolers usually walked, but many high schoolers had cars. Some had bicycles or motorcycles at home but seldom rode them to school anymore because of the stigma associated with them. Cars were cool and the dudes who drove them ruled our social lives! Incidentally, cool dudes also carried money and the rubber they bought from the quarter vending machine at the gas station in their billfolds.
Off campus destinations were nearby hamburger/hotdog/rootbeer walkups or drive-ins and neighborhood grocery stores. If you relied solely on your feet without benefit of transportation you had to choose wisely or run swiftly to avoid the lunchtime crowd buildup caused by the early arrivals at your destination.
We could purchase the items you mentioned for similar prices at these places. The grocery stores also carried school supplies and other items if we were out of theme paper, pens, gum and candy, BC powder, firecrackers (seasonal), comic books, under the counter tobacco products and men’s magazines, etc. I recall the school didn’t supply me with anything beyond school books and a desk back then. The rest was up to me and my parents.
You could buy a lot for under 25 cents. Most of us from blue collar families worked around the house for allowance money or in the neighborhood for extra money. Some were lucky to have paper routes if they had a bicycle or motorcycle to deliver the papers. So we often had more than 25 cents we could spend wisely or spurge without parental oversight.
Many times I brought my lunch from home and only purchased a cold drink or candy bar from one of the above. Other times a Moon Pie and a cold RC Cola from the grocery store was all I needed. Others bought a package of peanuts and a Coke to pour the peanuts in. Lunch for ten cents, what could be cheaper.
Anyway that was then...
Ah, the old peanuts in the coke (or pepsi) bottle trick. Remember it well.
When sanity ruled there were three classes before lunch and three after lunch. With an hour off for lunch you day matched closely with a working parent day, Classes started at 9:00 and ended at 4:00. No air conditioning in those days made summers unpleasant enough without starting at 6:00 and ending at 5:00 like some schools today. Busing schedules make a lot of things untenable not like my school where one bus handle it all.