a while
well unless your having a baby tooth extracted there should be no other tooth that comes in.
couple hours.
A chipped tooth does not heal on its own because enamel cannot regenerate. The healing depends on treatment. A small chip repaired with bonding can be fixed in one visit. Veneers or crowns may take a few days to complete, depending on lab work. If a root canal is needed, recovery may take a week or more for the tooth to fully settle. Without treatment, the chip can worsen or cause infection, so early dental care is essential.
well, it depends on the situation
about two to three months.
6 Hours
It should not take long, if you are having trouble see related questions answer
Tooth decay is generally not cured. Usually it is removed along with part of the tooth. In this case the 'cure' is a filling that may take 20 minutes or a crown that make take 2 weeks.
24 hours
its fine as long as it was a baby tooth. it will eventually sand down the sharp edges and fall out and he/she will be fine. if its an addult tooth take him/her to the vet to possibly get it pulled.
Not sure what you mean by damaged tooth. But a tooth that no longer has a nerve root will turn gray if not filled or capped. it can take from months to years depending on many factors, but it will turn if not treated properly.