Is this what Michael Jackson Used? Or hydroquinone?

I remember the news showed a photo of a tube cream from his house, but I forgot the name but I think it was "Benoquin Forte" or something like that?

Yes, he used prescribed Monobenzone in order to treat his vitiligo affected skin in order to reach a more solid tone of skin. For most patients however, this is a last resort to melanin inducing therapy.

I wouldn't be surprised if he skipped repigmentation attempts if he did in fact suffer vitiligo prior to using bleaching product (doubt it).