I am an amateur author and i just finished writing my first book but i have questions . - Can i publish it with a big / small publisher free ? , or i have to pay some money ? - Well they help editing the typos ? - is it okay if i am foreign?

I too am going through the same thing as you. This is what I have learned so far.... It does cost. Most people go for publishing themselves. It's a little more attainable then finding a publisher or agent. The cheapest editor I found is $2,000. (At least for my size book.) It is a journey but if it is your dream... Don't give up.