How much money does it cost for one person to live well during one year in Colombia ? Rent,food,etc?

I think Onetwothree gave you a good estimate of general expenses to live "well" in Bogota. As he says, all depends on how much you have and what you want. I grew up in Cali and lived 10 years in Bogota as a student and worker with a similar budget. If you need further info let me know. I don't know how this works but I guess you can contact me through email. I'll be glad to help you on your trip.