Start with the BEST primer+foundation or tinted moisturise you can afford. One really good primer is Oil of Olay Total Effects Day.
Once your primer or moisturiser is just a bit sunk in, it's time for foundation. Some folks like to use their fingers, others a sponge or foundation brush. I use a foundation brush spritzed w/a bit of Evian water out of a can and then blend w/a sponge. Blend well and invest in a good mirror
Some like to use concealers before foundation, some after. I do them after, but that's what works for me.
Next comes blusher. This you can go cheaper on. Now mine fades. So what I do is use a creme stick one first - No. 7 makes an excellent one. I blend this w/a sponge.
Then loose powder. Then powder blush. Again you can go cheap on this - I use Bourjois. Lasts for hours.
Eyes. Make sure the lids are primed. I use Clinque primer. Some use their hands, others a cotton bud. I prefer a brush.
Things not to go cheap on: foundation, concealer and brushes. Body Shop makes excellent brushes - except the blush one, I don't really care for that one - from £6-£12.50.
You can use cheaper brands for just about everything else - Bourjois and No. 7 are terrific lines.