If I am blind, will my children be blind as well?

Depends on cause. If you are blind from an acquired problem - trauma, diseases of childhood, etc. Than these will not be passed on. If you are blind from an inherited defect, you could pass this onto your offspring. A genetic counselor can determine this for you and calculate your odds.
Depends... ...On the cause of your blindness. Some causes of childhood blindness can be corrected in a way that avoids permanent blindness in children, such as retinoblastoma or cataract.
Maybe. Many causes of low vision or blindness are random events, but some causes are hereditary and run in families. Retinitis pigmentosa (rp) is an example of a genetic, hereditary cause of blindness. So, whether or not a parent's trait of blindness will be inherited by his children depends on the cause of the blindness.