toodle. (goodbye)

Hi, I'd like to know what does "toodles" mean. I really don't have context because a friend of mine used this like a goodbye, but I hope you'll can to help me however. 
I found this explanation: 

Toodles (or tootles): 

• A shortened, more casual version of the expression tourelou (Anglicized as "toodle-oo"), meaning

Is "tourelou" French? I didn't find it nor on the French dictionary, nor on the English one. And what does it mean too? Thank you so much!