How to add a bit of Hp to truck

So I bought a Tacoma a couple of months ago I know what some will say that it not ment to go fast, but want to give a bit more power not sure what the previous owner did to it but I thought it was really slow turn out it's quicker that q v8 Silverado around the year 2003 and other cars and truck I tested in because I was surprised want to know what parts I can add for a bit more hp with out adding a supercharger or turbo

 

Not much you can do to be noticeable. Just get some gears lol

 

A turbo is really your only option although I'm sure more horsepower can be squeezed from any stock engine, but it usually requires a very expensive rebuild.