Don't worry...

Teething period starts in between 4 to 15 months...
My son too got his teeth in 11th month...
Every child will be unique in reaching there milestones...

That is perfectly fine. Teeth can sometimes come as late as 15 months of age.

Hi give only breastmilk exclusively till age of six months after that u can give formula milk and semisolid food both along with breastmilk and give clean cotton cloth refrigerated one for chewing to soothe the baby's gums and pain too and prevent your baby from taking everything in the mouth to prevent infections and diarrhoea during teething

Hi does baby get stiff or stretched too while doing the movements?

Hi that's normal due to iron, clean with cloth dipped in lukewarm water

Hi weight is good, but if you can find blood in stools them give mashed banana in the diet for maintaining bowel movements and even if it not improves then get a stool test done

Hi yes its normal, give clean cold cotton cloth refrigerated one for chewing to soothe the baby's gums and pain too and prevent your baby from taking everything in the mouth to prevent infections and diarrhoea during teething

Hi is your baby teething?

Hi use finger brush for doing brushing and avoid sweet at bedtime

Hi teething period varies from baby to baby and may occur between 4 months to 15 months thus don't worry