Breadboard process: Using a wood board or the cardboard box the mobo came in, you install 1 mem stick, the cpu, if you have onboard video then you don't need to add the GPU, wire the case power switch to the mobo, then run the PSU connections to the Mobo ONLY. Connect to LCD from the IG or GPU, as the case maybe, power on, do you get BIOS? Does it show the right memory and CPU?
If no then your problems start here. If yes, power off add second mem stick (your required to do them in pairs) and restest, then if you have IG add the GPU (a duh moment for most you needed to go into BIOS and tell it to use GPU not IG first when displaying video), retest, then add HDD, restest, add DVD, restest, once all 'parts I am going to use' are connected and you can get to BIOS, then your good on those parts and save a load of 'what went wrong ' later.
Now disconnect GPU (reset back to IG instead), Drives, PSU. Insert the board and secure it in case. Again reconnect PSU ONLY , retest, then add GPU (again change BIOS), retest, add first drive, retest, etc. till it is all installed THEN LASTLY worry about installing Windows.
If all this is too 'over your head' STOP NOW! There is a VERY HIGH RISK to shorting / frying these parts (and thus you have to pay OUT of pocket AGAIN for a replacement part). If this is over your head then get a friend whom is a Computer Geek to do it for you, or take it to a Mom & Pop to build for you.
This is just the basics, and not even getting to dealing with debugging problems, and not even considering software issues yet.