I never had a Sony camera in my life but with the Canon I will use this:

Standard light topography for the beginner with one flash.
2 lights and one reflector. Just goole "Lighting setup for a portraits" you will find a lot of staff. Here is a Flash chit sheet for you (Flickr Photo Download: Portrait Lighting Cheat Sheet Card), very handy, a lot of people just don't know how to use their flash.
Make a nice background. (I have made mine out of chip PVC pipes which I got in the local hardware store and my wife gave me one of our old sheets. Actually it was my son's.)
At the beginning I was using two halogen construction lights and I made softbox out of paper, make sure lamp is not overheating a lot it can cause a fire. You can find some white plastic it would work too. A milk plastic bottles are really good too.
Reflector you can get for $5 dollars in a car supply store, the one that goes against your windshield to protect your car from heating. The whole lighting kit shouldn't cost you more then $45.00 and milk you can drink yourself during your brakes.

Lenses:

As at was already said you should use what "doctor" prescribe with your camera. Again I don't know Sony technology myself but something tels me that Prime 30mm, Prime 50mm, Prime 85mm, Ranges 24-70, 18-85, and so on, something between 18 and 100mm. Also you could use Macro 100mm and Macro Telephoto 150mm and 180mm. Some people use 135mm to make portraits. This may be related to the size of the shooting stage and distance. In my personal opinion primes and 24-70 is excellent choice for the Canon portrait technology.

Positioning lights:

Put one light above the subject at 20 minutes, it called hair light. One almost strait at the subject at about 28 minutes, assuming your subject at 12 o'clock. Put reflector at about 40 minutes play with the angle this depends on subject size. Set you flash to bounce of the wall or of the celling in direction that you need light to be shot and each shot if you changing position keep an eye on the flash. That should do for the beginning. As you will shooting you will understand the game a lot faster.

Hope it helps, good luck!