What is the most small budget friendly car audio stereo and speakers? Where should I get them installed?

For a good sound system your going to have to spend a bit of money regardless. For door speakers go for Alpine, Kenwood, or Poineer. For subs consider Alpine, Rockford Fosgate, Polk, JBL. Amp wise never go by maximum output power.. that is useless. Look for RMS thats what really counts. An example for decent setup would be An Alpine Type R 10" $179.99 with a Alpine MRP-M500 amp.$199.99. And you can make your own box it would save you alot of money! Its not that hard. And A good wiring kit. Such as a Tsunami 8gauge kit. $50 This will sound nice and klean and it will boom too!