Hi vhoang,
I also make dress shoes with a minimalist toolset. It depends a bit if you are making welted or cemented, but I would strongly recommend cemented for you first few pairs of shoes. Trust me, it will save a lot of frustration! So here's what I use:
Curved knife (I use this one: http://cordwainertools.com/index.php?route=product/product&product_id=190)
Cement (Barge's is great)
Whetstone or other sharpening stone
Lasts (I use ebay and measure feet on a Brannock)
Basic sewing stuff for upper: fine thread, small sized needle, scratch awl, compass
Pattern making: Masking tape, posterboard, pencils
French hammer (a regular hammer can work too)
Wire nails 1-1.5"
Rasp
Broken glass (2mm framing glass if possible, a broken beer bottle can work too!)
Sandpaper, 100 grit and 150 grit
Lasting pliers are optional, but really do speed up lasting
If you want to welt, you also need:
Heavy thread and heavy curved needle (you can just curve it with pliers)
A curved awl
1/4" brass nails or wooden pegs and a pegging awl
And of course leather:
1.5-2.5oz kip or calf for the upper
3-4 oz shoulder or belly for the heel stiffener
5-6oz shoulder or belly for the toe puff (optional)
5-6oz belly for welt if welting, otherwise any weight is fine
8-10oz shoulder for the insole if welting, otherwise any weight is fine
5-6oz shoulder or belly for the leather shank
Metal shank is optional, good for weak arches or heavy people
Cork sheet (optional, can use more belly or shoulder)
Sole bend. 10-12 iron is standard, I think that's around 14-16oz
Two great blogs that helped me immensely are http://shoesandcraft.com and http://carreducker.blogspot.co.uk. http://cordwainertools.com has a great dvd on cemented construction if you order $100 of tools. Andrew Wrigley on YouTube also has a good video series, but with a few flaws (he is a hobbiest, the others I mentioned are professional shoemakers). If I were to start all over again, I would follow Andrew Wrigley's tutorial for the upper only, go to shoesandcraft.com to look up how to do a toe puff, and follow the cornwainertools.com dvd on how to do the rest.
Hope that helps and good luck!
Joe