Any advice on best skin care /makeup?

I am trying to revamp myself, so so speak. I want to look stunning and healthy! I had my fourth baby 9 months ago and found a site that sells many types of high-end products, both for skin care and makeup. I have relatively nice skin but some sun damage (spots) and a couple light scars. My skin is also uneven. Sometimes I break out a little but seldom. I have dark circles under my eyes and they get puffy as well from lack of sleep. I am getting myself back in shape physically and am in pretty good shape, except for that baby tummy! I am planning on buying LipFusion because of the great things I've heard about it. I also want to have glossy hair (glossing products?) and am dying to try Frederick Fekkais Shimmer Spray. This website offers Peter Thomas Roth and his products sound good, but also they offer Murad, Lancome, Talika, Clinique, La Prairie, Ahava, Sisley, Borghese and something like Noevir(?)I am broke right now but have credit with this company. I'm 37 years old. Advice please!