Can cortisone shots make eyebrows grow ? and if so how much is it ?

Not likely: Cortisone shots are used to treat one type of alopecia (hair loss) called alopecia areata (aa). It is very rare to have aa of just the eyebrows, therefore cortisone shots probably won't help. See your dermatologist and perhaps he/she could suggest something else. And if cortisone shots was necessary, it should be covered by your insurance so just the copay would suffice. (about $100 if uninsured).

No: You can increase your eyebrow hair by using Minoxidil which is available over the counter. Rub it on twice per day. It will take several weeks to work.