bar and cranks questions

[swaz]

Doing up an old, old bike. Seems to be the generic steel frame you see a lot. It had on it some super cool Shimano 600 gear

which is rusted and the cranks don't have any Shimano 600 branding on them...
anyway!
What are peoples thoughts on flat bar v drop bars v bull horns (cow horns) advantages/disadvantages? I will be commuting on it mainly which is 25km one way. 1/2 flat bike path, 1/2 roughish road which is undulating.
Also, the cranks... Do I just remove the big chainring and run with the small one which I guess is about a 39 or 42?

[h3ndry]

The chainring you use will depend on what gear you want to run, but generally yes, the smaller one will be good.

As for bars, I like risers because of the better view and more upright position when booting around urban areas. But I also have short little T-rex arms, so take that with some salt.