You should take your puppy out at least every hour, if it's a male puppy they need to go more often that a female puppy or so seems anyway.
Like train it to use puppy-pads ? Or outside?
Usually by the first or second bathroom trip outside.
Every dog is different but probably no less than a month
my dog had a puppy and hasn't had a second one yet so how long does it take for A SECOND PUPPY TO BE BORN
one month
Yes unless you would like it in your house instead
To train a puppy to go to the bathroom outside in cold weather, keep your puppy on a regular schedule for going to the bathroom, dress your puppy in warm clothing when you take it outside, consider using a bathroom pad or litter box inside as a temporary measure, and use a consistent command to signal to your puppy that it is time to go to the bathroom. Gradually move the pad or litter box closer to the door and eventually outside, and be patient and consistent while your puppy is learning. If your puppy has an accident inside, clean it up thoroughly to remove the scent. It may take several weeks or even months for your puppy to be fully pee trained. I recommend this: ʜᴛᴛᴘꜱ://ᴡᴡᴡ.ᴅɪɢɪꜱᴛᴏʀᴇ24.ᴄᴏᴍ/ʀᴇᴅɪʀ/434590/ɴᴀʀᴅ20/
This depends on the temperature and the aeration of the bathroom.
I am assuming you mean " give a 9 month old puppy his first shots"Well , puppy should have had his first shot at 3 month, depending on the breed, some very small breeds get their shots at 4 month. But better late then never. Take this puppy to the vets as soon as possible, the vet will advise you what is needed and how to proceed.
There is a possibility that the puppy may pass away (die of a horrible and painful death, thanks to whoever did not take care of the puppy properly)
There called worms they can be uncomfortable for puppy, so take puppy to local vet to get weighed and they will then give your puppy worming tablets your puppy will have to take these regularly maybe once a month till a certain age. Vets do package that will send out tablets when they needed to be taking.
3-4 weeks
about 8 weeks