I've included the display options on each item. Some can be stood with the original armed wing stand. Some are just for wall hanging. Some have both.
As most of the frames I use are upcycled, often the original fixings are unsuitable or damaged so generally I will add a 'toothed hanging hook'. These are much better than eyelets and string as they work much better with gravity!
Depending on the weight of the picture and what the wall is made from, you will need to use a nail, picture hook or potentially a rawlpug and screw.
Wickes have a decent guide here: