You can purchase deacidification spray from University Products -
https://www.universityproducts.com/b...ion-spray.html
This will work on newspapers as they have a high acid content. They also sell other archival materials so that you can view and display the pages. One option is to encapsulate them in mylar which is not too difficult. University Products has good customer service along with many how to tips and videos. Any type of preservation will get pricey, but learning to do the basics yourself will save time and money. I suspect David C. would attest to that. I would not go to some local craft store like Michael's or Hobby Lobby. Their focus is not preservation but sales. They may have a few items, but not necessarily the knowledge. I would stick with the companies that focus on this - University Products and Archival Methods.
I have used both companies for some items. My photos and negatives are stored archivally. Additionally, I also do some repair on documents, photos and programs using document repair tape which is tissue paper with a neutral PH adhesive.