[old ugly]

1st and reverse gears will be REAL noisy and it will slip out of 2nd.
to make it right you need at least the
-cluster
-1st/reverse slider
-2nd/high slider
-possibly the reverse idler (cant tell from the pic)
the shafts and pins, cant' tell from the photo.

if you are on a tight budget search for used gears or trannys. but remember , one mans idea of good may not be actually good. so be careful what you buy.
i took apart 6 trannys to make one fairly good one. (still noisy)
new is pricy but you may be better of in the long run.
or
if this is your forever keeper then a full syncro tranny may be in order.