I was given real old sewing machine & all attachments,need manual help

There are many manuals online. Some are free and others require payment. I found some info on your machine using the model #15817800. The link below is to a parts list that shows a schematic of how various parts of your machine work. https://www.searspartsdirect.com/model-number/15817800/0582/1220000.html?searchType=manualSearch&searchTerm=15817800 Hope this helps, but if not you should do a search for Kenmore Sewing Machine model #15817800 manual.

I tried again and found your manual at this site: http://www.kenmoresewingmanuals.com/kenmore_158_manuals/kenmore_158_manuals_3.html I think they want 5.95 for a PDF download. Be sure you check out "Click here for terms and download information" so you know how the download works. Scroll down until you get to your model. If you decide to buy this, print out the manual, then copy the PDF to a disc or USB storage that is kept in a safe place just in case your spill coffee on the printout or your dog eats it.

Start with these!

https://stitchnerd.wordpress.com/2012/06/22/free-kenmore-sewing-machine-manual/

http://homeappliance.manualsonline.com/manuals/mfg/kenmore/kenmore_sewing_machine_product_list.html

https://www.quiltingboard.com/vintage-antique-machine-enthusiasts-f22/free-downloadable-sewing-machine-manuals-t206372.html

Sometimes sewing machine manuals are considered a "part" so you might be able to find it that way too.

Here's one for $5.95 .... http://www.kenmoresewingmanuals.com/kenmore_158_manuals/kenmore_158_manuals_3.html about 1/3 way down the page

Or try Sears Parts Direct at 888-501-8765. The Model # is 158 and the 17800 is the unit #.

http://www.kenmoresewingmanuals.com/kenmore_158_manuals/kenmore_158_manuals_3.html

Go to the above website. On the second page scroll halfway down the page looking for 158.17800. You can choose to click on the button to download t he manual for free, or you can pay them to print and send it to you. Good luck.

All free.

https://www.manualslib.com/brand/kenmore/sewing-machine.html

http://homeappliance.manualsonline.com/manuals/mfg/sears/sears_sewing_machine_product_list.html

I googled my machine that I needed a manual for and one popped right up and I printed out the whole little book.