The Italian government, reacting to two terrorist attacks in Turin, adopted several measures yesterday to facilitate a crackdown on leftist urban guerrillas.

The actions, vehemently opposed by the small, civil rights-oriented Radical Party but supported in large part by the powerful Communists, came only hours after terrorists wounded two employes of giant automobile manufacturer, Fiat.

Premier Francesco Cossiga announced creation of a National Committee for Order and Public Security to serve as a data bank and planning office in the fight against the violence. Cossiga also appointed the chief guerrilla hunter, Gen. Carlo della Chiesa, as head of the paramilitary carabinieri police in northern Italy, where urban guerrillas have been most active.

Yesterday's assaults against Fiat followed the shootings Tuesday of four Fiat teachers in a Turin graduate business school. Six other persons also were lined up and shot.

All of the victims this week were shot in the legs and the Red Brigades claimed responsibility in each case. In addition, thieves also believed to be guerrillas stole $600,000 in payroll money at a Fiat factory in Turin yesterday.

Yesterday's shootings brought to 26 the number of Fiat employes wounded or killed in shootings over the last three years. They indicated, according to special correspondent Sari Gilbert, that after a lull of several months Italy is in for a renewed burst of terrorist activity.