The instrument you play and activities you are engaged in will affect the equipment you require. Acoustic instruments require very little equipment. In the case of an acoustic guitar it may just be a plectrum. Electric instruments will require equipment such as cables, amplifiers, monitors and so on.
Music recording equipment is very specialised and includes such items as microphones, preamps, multi-track recorders, mixers, computer hardware and software and so on. DJ equipment consists of turntable, mixers, lighting and more. Music studio equipment would be, besides music recording equipment, stands, racks and such.
Equipment can be purchased from music equipment shops and online. If you are a music equipment shop or company, contact us to have your shop placed here as a Musicians.com resource.