This is more out of my curiosity than for a need.

If a person would stake coins/tokens in a pool, and the website would go offline at some future time, is it possible to programmatically remove the staked coins from the pool?
If so, how is this done?

I'm assuming you would need the coin's smart contract address and knowledge of the functions in the contract. This can be normally gained from looking at the address in a blockchain explorer, correct?

Are there other ways to view the functions of a smart contract other than a blockchain explorer?