FW's take standard 15x1 sewing machine needles, no need for anything special there. There is no such thing as a "side thread" needle per se. It's just in which way you face the needle when loading it into the needle bar. Bobbins can usually be easily had at your LSMS or ordered online but they are specific to FW/301's. They're just a smidge bigger in diameter and thinner than a standard class 15 bobbin. Do note the way the needles face and the direction the threading goes. Otherwise you won't pick up a stitch. Happy sewing!