Looking to purchase an intake/ exhaust

My first truck that I ever had was a 2000 Chevy S10 pickup and I put a K&N cold intake on it love the sound it made noticed horsepower increase never check into miles per gallon gain. For my 16 tacoma trd double cab I just don't want to do it for the sound only but I'm more leaning to horsepower and miles per gallon gain. I'm also looking into getting an exhaust system don't want anything too crazy loud but a very nice Rumble. I zero experience in that area. Should the exhaust be done first or the intake. I'm open to everyone's ideas and thoughts so throw them at me.