Most traditionals shoot off the shelf, but a few do use flippers. The NAP Flipper II stick-on is good for wood riser bows without an arrow restbushing,and something like the Cavalier FreeFlyte is good for metal risers that are drilled and tapped for mounting a rest.

Very, very few traditionals use sights but it's not unknown. A lot of the old bows from the 60's have holes in them where they had sights mounted on them. If you use a wood riser, then get some screw bushings installed. Makes for a lot cleaner look and solid mount. Most sights these days are made for compounds with offset risers, so you might have trouble finding a sight that will adjust close enough to the riser to actually work.

Be aware though that sights are not legal for shooting traditional class in tournaments, and elevated rests are forbidden in some tournaments.