I suggest you download yourself a nice free art package and search the internet for royalty free textures.
Check the licence restrictions, such as commercial and non commercial usage.
Boxes and crates are a good place to start learning texture work.
Sure its easier using pre-made textures aquired from other sources, but using textures made yourself is ultimatly more rewarding and will bolster your self-esteem aswell as improve your modelling and texturing skills. Everyone starts somewhere.
PC Specifications : AMD Phemon Quad Core 2.2Ghz. Windows Vista Home Premium. 2GB DDR2 RAM. Cheapest X10 Card on the Market.
TGC Store Tag : Kasseyus (need to make a graphical sig one day)