Free!
The costs to neuter a dog, including a boxer, will vary depending on location and the vet. You should be able to have it done for somewhere around $200. There are often low cost spay/neuter programs offered by different organizations. It pays to check around.
It is never to old to neuter a dog, and the longer you wait less time your dog has to live.
Yes.
The veterinarian.
Yes.
7 months
To "neuter" your dog, you should take him to a vet and have the procedure done properly. Many shelters and community agencies also offer low cost spay/neuter programs. An online search of those terms with your zip code should give you some information in that area.
NO! You have to spay or neuter.
Don't let your dog mate or neuter/spay your dog.
If you are asking whether it is good to neuter a dog, then the answer is yes, if you do not intend to breed with the dog then it is definitely better to neuter the dog. This makes him healthier and happier.
It's laser surgery for neutering a male dog.
You spay a female dog and cat, you neuter a male dog and cat.