Looking for a certified pre own truck any help would be appreciated?

i am a teen looking to buy a used car. i need a truck for landscaping and atv hauling purposes. i also do some off roading however being i will need it to travel for work i wish it has ok milage. Nothing xtrodinary just ok. also my price range is 10-15 thousand dollars. i wish to get something that is automatic and something with a back to it for friends to ride and for lugage. im not very sure what to get but i havent really looked to long. all help is appreciated and as far as age i think something within the years 2005-2011 . again all help is much appreciated. only serious answers please.