Quoting XoPiNKoX:" So, i am already thinner than I'd like to be, but that does not mean I'm even close to being in shape. ... [snip!] ... you know of that won't burn a ton of calories but will allow me to tone up all over without dropping more weight? Thanks "
Weight lifting will grow your muscles. It's really what does the "toning" which really is just developing muscle and reducing the top level of fat. If you're happy with your weight, then focus on building muscle. Make sure you aren't causing a calorie deficit so you don't burn off more weight.