The following directions are based on the idea that you are replacing existing doorknob/lock hardware.
Begin by removing the old doorknob and lock. These are generally secured by a number of Phillips head screws that vary in length.
Once the lock mechanism is out you can remove the deadbolt. Insert and secure the new lock mechanism. Be sure that the screws are facing into your house so they cannot be removed from the outside.
Your old "strikes" or "strike-plates" are also probably compatible with the new hardware. However, there have been security advances in lock design in manufacturer in recent years, so go ahead and use the new ones.
Remove the screws from the doorknob. Generally it is difficult to get a screw gun into the head of the screw behind the knob, so use a screwdriver carefully. It is easy to strip the heads on these screws. The doorknob will come apart easily once the screws are removed.
To install the doorknocker use the template provided with the product. Make sure that the template is level when you line it up. You should also check to see that the door is level. If you door is not level and the template is, the knocker will appear to be crooked even though it is level.
As with the knocker, check to make sure that the kickplate is level, it too can look crooked if it is level, but the door is not. If the door is slightly off level, it is better to line up the kickplate so that it appears to be correctly oriented on the door. Use duct tape to hold the kickplate in place while you drill pilot holes for all the screws needed to attach the kickplate. Once the holes are drilled, secure the screws and then remove the protective plastic film from the kickplate.
Installing the house numbers will require the removal of the old numbers and the drilling of pilot holes, whether into wood, concrete, or brick. If you are attaching the numbers to a brick facade, it is easier to drill into the mortar than the brick. For brick and concrete, you will need to use a masonry bit for drilling. Once the pilot holes are drilled, secure the numbers with the screws provided.