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1) i bought the h-bridge form digi key for like 1.95 or somehtin like that, is that everything i need like the one in your pics?
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No, that H-bridge driver IC is made for a digital circuit to drive its inputs and a motor directly connected to pins on its output, along with a clock pulse generator which sets the PWM frequency. What you need is a mosfet driver IC which steps up the voltage to drive the gates of the more powerful FET's.
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2) is this setup more powerful (able to run hotter motors) than neurokenetics setup with the IRF4905 and IRL3705s?
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I'm not sure if he took "gate driving V(GS)" into consideration or not, but if he didn't, then yes, it's more powerful, if he did, then it's about the same. I used 4905's and 3205's however.