Not sure what's available in your part of the world, but out here places like the Guitar Center and Sam Ash sell these little 4-channel PA systems consisting for the powered amp and mixer and two speakers each with a 10" woofer and a horn for about $200. Those are perfect for playing tracks through and it could handle microphones too. It's not super powerful but I think adequate for what you want to do. The names out here are Phonic, or Harbinger.
Dre, I just bought a used Simmons Da200s. It is made for Simmons electronic kits as a monitor but would be great for what you are looking for. I bought mine to use if I ever wanted to mic my cajon. But I found out what an amazing little piece of equipment it is. It's rated at 200 watts. It has a 12 sub with a 100 watt amp and it has two 6 inch speakers and two tweeters each with their own 50 watt amp. It also has a jack for MP3 players and the sound quality is first class. It has two channels, one with tone controls, a headphone jack. and a mic output that you can run through a PA. I got it used for $150.00. Like I said if you can find one (brand new they run around $325 ) it would be just what you need. John