How do I create solar energy?

Residential Solar Power Question

I want to make my own solar energy at home, I love the idea of using solar power to do some things around my house.

I don't want to power my whole house, I just want to get enough solar power that I could run a small stereo and maybe a small fridge out on my patio when I have friends and family around. At the moment I have to run an extension cord through the window out to the patio.

Can I go into a shop, tell them what I want to power and just buy a solar power kit?

If I do buy a kit for solar power do they come with detailed instructions on how to install them? Also will I be able to add more items and maybe add more solar panels to the system later, maybe if I decide to add some garden lights to the system?