Before installing gutters make sure to take care of the following recommendations.
It is highly recommended to have the installation done by professionals who have many years of experience and all of the necessary equipment required. However, if you have some handy man skills and are willing to give it a try, here is a guide on how you can install cullises on your home yourself.
Most importantly, you will want to address how you would like to channel the rain water away from your home. Look for areas away from your home that would be good to have the water routed to. The goal is to have all of the water that runs down the roof to enter the gutter, go down the downspout and exit far enough away from your home to prevent any damage.
If you are not using seamless gutters, which you will most likely not unless you have access to a machine that will produce those, keep in mind that they come in sections of 10 feet each. You will want to measure the parameter of your roof where you plan to install them and then add an additional 10% to allow for waste. This is due to the fact that you will not be able to use exact 10 feet pieces everywhere since you will have to make cuts to make the eaves throughs fit. So as you can see there are many factors to keep in mind when learning how to install them.
On top of the sections of the gutter that you will need, you will also have to calculate all of the other accessories required for installation. These include downspouts, corners, elbows, screws, end caps, mounting brackets, etc. It's useful to talk to a professional or someone who knows how to do such an installation, before taking on the task. It might looks very simple but planning it correctly is a very important part of it.