That is only your assumption that only the third raikage could survive it. The manga never said "Only the 3rd raikage can survive being hit by all 9 bijuus". As for Madara absorbing Hashirama's chakara, Naruto was on the ground. Remember, Madara speed blitzed and bowled over Naruto and Sai. That is why Naruto couldn't help Hashirama. Also, worn out doesn't mean out of chakara. You could be worn out from running a mile, but still have chakara. Plus Naruto didn't appear in the very beginning of the chapter. It was toward the end. Therefore he may have had a minute or two of rest.