I have a brevis car, it starts but the engin doesn't turn

I guess you mean the starter cranks, but the engine never runs. That could be fuel or ignition. If fuel, spraying starter fluid into the air intake, then cranking, will get the engine to run temporarily. If ignition is bad, it won't run.

A fuel problem could be fuel filter, water in gas, fuel pump, or either carburetor or fuel injector is bad.

Electric could be wiring, ignition switch, distributor or sparkplugs, sparkplug wires problems.