I pieced together a system, from inexpensive finds, but if I had a chance to buy a package deal, I would do it.
Subs are good but you won't need them up front. Mains, monitors, mixer/amp, stands, cables, CART, and something to carry cables and mics in. ALSO, a word of advice - Be sure if the band is helping you , set up a system of setup/teardown/cable care and handling that helps you make it easy, does not damage your equipment and makes the next setup easy.
We use a QSC GX5 for mains and mons. I chain them, and have MORE than enough power. we have a MUCH larger system, but in 90% of the rooms, we use this and it is fine, with an EQ, BBE and PV10 non powered mixer. I use a set of JBL JRX112M monitors for vocal tops, and older Yamaha 10" monitors, because I had them for a small gig I did a while back. The drivers were replaced this past year and sound GREAT.
I carry the Whole PA, My bass rig, a guitar rig in my Scion XB. with on of those lightweight Carvin systems, I would be set, and probably have more flexibility.
May add subs, But I have no way to carry them - so who knows.
Before anyone says that won't work, i have been using it for the past year, about one gig a week avg. about 500 watts per channel at 4 ohm should be good - a little more is better - for head room. Less will leave you less than satisfied I believe. You can usually add power amps if you need to.
or powered subs, etc.
My $ 0.02