Once again, I need help

Area in front of my house we let the weeds grow wild, all for leaving things for tomorrow (procrastinate)..i'm going to do it myself because my budget don't rich to paid a professional. I all ready pull all the weeds ( the easy ones) but since it has rocks and many years no taking care of the weeds, roots are all over underneath the plastic ( the one that they place to set rocks ) what I should do?? to clean everything and get my garden going.. thanks for everything ...

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wild weeds growing all over
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as you can see underneath the rocks and plastic, roots grow wild to.. how can i kill them and start with my garden?
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this is underneath my window
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after I pull the weeds, still i need to get rid off the weed roots...

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Once again, I need help

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