From what I can gather, the engine in your Barina is an interference design. That is, if the timing belt breaks, the pistons and valves (in the cylinder head) will, indeed, meet head on at speed, turning the engine to junk in a slip-second. So make sure the timing belt is changed every 100,000km to reduce the risk of this happening.

Some engines with timing belts are non-interference designs, meaning that a broken belt will simply allow the pistons and crankshaft to continue to rotate without hitting (or damaging) the valves. Replacing the belt and retiming the engine will return it to full health. You'll still be stranded by the roadside if it happens, of course.

It has a timing belt, which has a recommended change interval of 10 years or 160,000 km whichever comes first.

You can’t. It’s filled with fluid in the factory and that’s it for the life of the car. If you want it checked or changed an automatic transmission mechanic could do it for you.