Do you need an expensive camera to take good photos in the streets? Not really. As I said in my first posts there is no need for high-end equipment. You can even take interesting photos with your smartphone. Technically a high quality camera gives you more options when it comes to quality, post processing etc. but it won´t make you a better photographer. The most important camera is the camera you have with you (or forgotten at home as Zack Arias once said).
I took the following shot with my Galaxy Note 3 an processed it with Pixlr: