Target?

Part of the fun (fun?) of adjusting to a new country is learning where to shop. Finding your own set of bonnes adresses. So what I want to know is - where oh where can I find the French equivalent of Target?? Tar-jay. My monthly stop for all household supplies. One of the rare reasons I ever drove my car in Washington, DC. In particular, I want to stock up* on beauty supplies. Shampoo! Conditioner! Big bottles of body lotion! Nail Polish!

I've tried the grocery stores here, but the selection is pitiful. Then I went to the pharamcie (or even better, a parapharmacie). Great selection, but Oh the prices! So I finally settled on Monoprix which is slightly more expensive than a normal grocery store, but has a better selection. There are a lot of the same brands I'm familiar with in the US: Dove, Pantene, Neutrogena ... but the bottles are half the size! And the prices are more expensive! If I'm going to pay this much for beauty products, I might as well buy everything at Sephora (aka, The Best Store Ever. But also very damaging to my budget.) Beauty products are a huge obsession for me. Anyone have any tips on where to find them even slightly cheaper here in France?? And what about other household products like plastic wrap, ziploc bags, toilet paper etc. Am I destined to buy the small, expensive quantities at the corner market forever? Help!

*I fear "stocking up" is an American thing that I'm going to have to get over in France. They apparently Just Don't Do It.