I posted before reading Musket curious. I suppose this kind of subject gives room for ignorance to express itself.
1. Scotland will keep the monarchy because it always had a monarchy before the Union with England.
2. The pound sterling is as much Scotland's currency as it is rUK's.
3. Scotland will have it's own defense system as the current UK defense system will be dismantled and Scotland will receive it's proportion of assets.
When a divorce occurs, one member does not keep everything as Musket seems to think.
After independence my view is that in a few years Scotland will swing to Republicanism and probably it's own currency. Salmond's government may not exist after independence as the people of Scotland will decide who will govern them, a bit different from now.