i really want to go to forgien countries to help out and spread the word of God however i am only 16 and do not have a lot of money to put towards the trip. Do you know of a mission organization that is cheap (or free) and will allow 16 year olds to participate?

Foreign travel is expensive, but your local church may be able to help. You could also do fundraisers.
It’s difficult to go free/lowcost anywhere, that’s just how it is. But in the meantime you can help in your own city, like food banks, habitat for humanity, etc. and trust God to provide in the other opportunities.