If you can't get a new chain and chain breaker tool easily, then you might try flexing each stiff link side to side and see if that loosens them up.
A lot of Multi-tools for bicycles now come with a chain breaker tool on them.
Seeing as your chain is 9-speed; look at each link carefully and see if one of them isn't a quick-link. You'll see a longish slot on either side of the like if it is a quick-link. With luck, if you have one of those on your bike you'll be able to take the chain off. If you can get the chain off, give it a good scrubbing with a wire brush and then oil it and try flexing any stiff links to free them up. You should be able to reuse the quick-link. Here's an image of an 11-speed quick-link and what it looks like on the chain. A 9-speed on is very similar.
Cheers