Two years ago I was knocked off my bicycle by a car and was too scared to cycle for a long time, and left my bicycle outside uncovered for over a year. That was a mistake.
Now, WD-40 applied to the chain did not help much. The chain still won't bend. I think cleaning it won't be possible, I will replace it. But how about the rest? I have no idea what I will have to do to make it work or if it is even possible. Do I have to replace anything else apart from chain and cables?
These are the bicycle specs.