It doesn't look to me like you have true scars. It looks like you are in an active acne infection, with lesions at various stages of eruption and healing. It can take about 6-12 months for full healing of old lesions, but, unfortunately, if you're still actively breaking out, you will have new lesions in the healing phase, so it seems like the lesions never fully heal and are therefore scars. They are not. The trick is to cure the acne and the dark marks (called post-inflammatory hyperpigmentation) will heal on their own.
That hydraquinone product won't really doing anything. It's non-prescription strength and is really just a glorified moisturizer, and, depending on it's ingredients, may actually clog your pores and contribute to more breakouts. Same with the glycolic cream...acids don't work very well in moisturizing bases, because the acid is too buffered to be acidic.
I would suggest you see a dermatologist to clear up your active acne and you'll be pleasantly surprised at how well the old lesions heal.