Hi and welcome. You have the general or standard foot and fabric guide on the machine. This foot could be used for piecing since you do have the fabric guide which you can set to your seam allowance. You can also purchase a 1/4" piecing foot which is available for low shank machines. The model 99 is a low shank machine. I purchased the 1/4" foot off eBay, but it is available elsewhere too. It fits all three of my Singers which is nice.
Shari