How to fix my leaking radiator in my 2000 ford taures without replacement?

I have a bad leak right under where my hose connects to my radiator on the battery side of the car. I have to constantly put water in it just to get to and from work. How can I fix it without replacement I can't afford a replacement radiator. And my car is also making a weird slap knock noise right down below the radio and air controls.it only makes the noise every once in a while but its loud and last about ten to twenty mins? What can I do without taking it to a shop I can't afford right now?

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