Reviving a trunk.

Cows scrapped the bark off a pine tree, the needles fell off, I cut the tree but see the trunk seems alive still.
Is there anything I can do with it, maybe transplant branches which seem have buds on them?

From what I can see on those twigs it looks like some kind of spruce tree.  Unfortunately spruce species are not known to resprout.  

Yep, looks like a spruce, and if it has dried enough that the needles have dropped, the buds are highly unlikely to have enough vitality left to grow even if cuttings would root. I wouldn't waste time on trying to replicate it unless it was a rare and valuable variety.

what about the trunk? can it be encouraged to sprout new branches?

I don't think there's anything you can do to encourage it - it either will or won't. If there were any lower branches or twigs left, it might grow from there, but it doesn't look promising from the pictures.

We had some leftover spruce seedlings from a plantation when I was a small child, so my father threw them into a steep bit of hillside. We cut those trees for christmas trees each year later; one tree was bigger than we wanted, so we cut it a couple feet up, and the branches curved up and became new leaders. We got two more christmas trees from that one stump!

Its not a total loss.

The roots below ground will feed the fungal network and will add bio-mass to the soil profile.  Plant another tree somewhere within the vicinity and take advantage of those benefits.

Then drive 3 posts around the outside of the new tree and wrap the exterior with some barbed-wire to keep the cows from destroying it.

Thanks I kept the trunk in and planted a variety of trees around it. I left the pieces of trunk laying around and noticed life is sprouting from them. Nursing logs.