I have the Juki TL 98QE and it doesn't have a needle threader, I don't like them.
Yes, the few stitches will be enough to hold the stitches.
I mostly do free motion quilting, when I use the walking foot, I try to line it up with something on the quilt, seam, edge, etc., you could mark lines to follow also.
I hope this helps. Enjoy !!!