I need to replace a broken timing belt on a 1.6 16Valve, Palio Sporting. I dont have a workshop manual and need to know how to setup the timing marks to be able to fit the new belt

Welcome here.
You can use a manual for any Fiat 1,6-16V engine, they are all more or less the same.
Bravo/Brava, Marea, Multipla, etc. etc.