Option 1:
5K for Pioneer HU
5k for front seps (maganda na makukuha mo dito like ryan audio or mb quart)

Tapos sir, gamitin mo na muna yung old rear speakers mo kung pwede pa. Ipon ka na lang muna for brand new 6 x 9 rear speaker for the bass fill

Option 2:
5K for Pioneer HU
2K for Targa x652c seps for the fronts (ito gamit ko, ok naman bang for the buck)
3k for brand new 6 x 9 rear speakers

Tapos ipon ka na lang ulit for under the seat sub. meron ako nakita worth 3-4K. I think pwede na yun kung hindi ka naman bass head.

normally free naman na sa store yung install pag bumili ka sa kanila ng HU at speakers eh.