What can I do to fix the scar tissue in my lip, and what can I do for my uneven teeth? (photo)

Long story short I misinterpreted the length of a jump and landed down face first on cement steps and broke my front tooth (can be seen in the picture). I also bit down on my bottom lip and had to get 15 stitches but I got this annoying lump....On another topic, I can see that I should probably resort to braces, but what can I do for my bottom back teeth which are just extremely short, and give me this fake overbite. When I bite down, my top row of teeth completely conceal my bottom row.