The pic doesn't show the bucket but I think that you have the same loader that I have.
The loader only has up/lift pressure and it is gravity down. The bucket is a trip bucket that you release when it is up and then you have to back up when it comes back down to the ground to relock the trip. The bucket has 5 or 6 prongs about 30 inches long that are tapered to a point and are flat. These are for handling manure. When it was new there was a flat steel pan the same width as the bucket with loops for the prongs that slid over the prongs and bolted to the bucket to make it a dirt bucket.
1/2 in hoses will be a good size and the pump was designed to use 30w non detergent oil but today with hydraulic oil the norm I use CIH HyTran oil
GOOD LUCK WITH YOUR PROJECT