Bicycle commuting is very simple. If you are just starting out, then use whatever you have. As time goes by and you are getting more experienced , you may start thinking about upgrading your bike and your clothing.But before you spend lots of money on cycling gear be sure you are commited to cycling. There is no point of investing in cycling gear and upgrading your bike , if you gona quit. My recommendation is just go for it and start with whatever you have and enjoy it. The most important things when starting out is to have a bicycle in good working condition that fits you and is comfartable to ride, followed by some basic emergency kit: pump, spare tubes, multi tool, and tube repair kit ( patches )... lights will be neccessary if you plan on riding when it's dark.