Variable issue. There are some genetic implications with the various forms of epilepsy but these vary with the type. These can run as high as a 50% inheritance risk in some forms. A visit with a geneticist in your local could help you define the collective risks derived from either side of the family.
No. While your child may have a slight increase rate of epilepsy compared to another child with no family history of the disease, it is absolutely certainly not a sure thing.