Photo business today isn't what it was 10yrs ago and you, unfortunately, an example. Here's why: back in lovely film days, those who wanted to emerge in this skill first learned various aspects of photography (lighting, exposure, composition, postprocessing/darkroom, etc etc etc) and while learning, acquired a BOX that allowed film to be loaded, and expose it based on so called rules. Today, folks go out and buy a digital camera and call them selves "
professional photographers" while knowing nothing about important aspects of photography and yet charging tremendous amount of $.
Now,
I AM NOT ATTACKING YOU PERSONALLY 
but I hope you understand that question you are asking has been asked by many many people on MOST forums, who want to do exactly the same thing. This is why CHIP above and my self
do not recommend turning photography into main source of $.
But here's my take
Camera:
Canon - (Used 20D, 30D, 40D), 50D (not sure if its still in production - great camera though), 7d. If got the budget for full frame 5d, 5dm2. Good lens that number of my colleagues use is
Canon EF 28-135mm f/3.5-5.6 IS USM Lens Review. Results are amazing and it isn't very expensive.
Nikon - d70 & d80 used, d90, d200 used, d300, d300s. If got the budget for full frame d700
Lens: famous 24-70 2.8 is nice, 70-200 is another choice. Personally, I love my old-school 28-105.
Printer and Paper: It might be cheaper to send the job to the lab and print there - I'm from NY and recently began working with a different lab APS 718-360-2779. Prices are amongst top competitors, they'll do color correction (headache of my shoulder) and turn around time is really good. In my case I live 2-3miles from them so I'm not worried about them sending me the job, but in yours, delivery is an option you can discuss. You can use cheaper places, winkflash, shutterfly, snapfish, but no1 there will look over your images unless its porn

and UNLESS you'll sit and color correct your images on calibrated monitor, your clients won't appreciate jaundice magenda color effect
Extra Skills - well you know business (75%) you know BS (25%) now its time to learn photography (15%) - lighting lighting lighting, exposure, composition, basic post processing, etc etc.
Good luck