My Nasty Backyard Lawn

Hello there... I am having the major remodeling at my home. First things first I have to do is to clean and clear off the yards. Just need your advices and opinions of how I can do it in the easy way. Of course you might say, chainsaw will do it. Let me tell you little bit about my home. My grandparent bought this land and a old house when my mother was thirteen years old. The old house was destroyed and replaced a mobile home when I was in my childhood. One of these pictures has a old sidewalk and a step in the front yard, that used to be an old house! So, for long time, my families had a hard time keeping it up the place, and I've decided to move here and wanting to fix and refresh everything to keep the memories going. It's going to be interesting when the work is done. So! Here are several pictures and I'm sure you'll say that it look terrible! That is why I'm here to ask for all of your advices. I am going to start the backyard to cut all the baby trees and build two bonfire in my garden area and other side yard. By the way, I will have these project of all kinds in "My Project" whenever I get it together. Thanks! Image: http://s5.postimg.org/u0y5zn4yf/20150320_103536.jpg Image: http://s5.postimg.org/92my4fys7/20150320_103616.jpg