From the agent in malta, take your VIN number with you, you can see it when you open the front passinger door, you probably have to replace it's tensioner
Just be 100% sure it's the timing belt before you buy parts etc. I have seen vitz with well over 200k miles on the odometer and never replaced it, it should serve the lifetime of the engine if serviced well (good oil and changing interval). The ticking noise could come from other parts of the engine eg. Head valves.