Begginner with some questions a little long but plz help!!!

hey every body new to this growing thing and this site so just wanna say hey, and also I had a couple of questions I needed answered if you don't mind ok I know during the first 3 weeks to a month you feed it no nutes and when I transplant to a bigger pot and go into vegetative stage you use a soil high in nitrogen ( I was told something like 20-5-5) and in flowering something high in potassium ( like 5-15-15) so my question is will the nutrients (N-P-K) run out of the soil? and if so is that why we use nutes or will (N-P-K) always stay in the soil and the reason for nutes is other nutrients such as zinc and etc.? Or is it to maintain all nutrients? And if so how do you measure the amount of each nute in the soil? Also after my plant is through with vegetative cycle and ready for flowering will I have to TRANSPLANT to another pot with soil high in potassium or would I use nutes to lower nitrogen and higher potassium in the soil I already have?

already looked in the already asked questions and every where else so PLEASE just answer my QUESTIONS!

Hey beensmokin...as your plant grows, it uses up the nutes in the soil. You should be in veggatative growth from a seedling, this comment confused me "when I transplant to a bigger pot and go into vegetative stage"
Either way, go get some decent nutes to carry you from vegging into flowering, Foxfarm seems to be very popular, it is available in a 3 pack, which should be more than enough for you, and it's under $40.00
What size pot are you growing in now? I'm assuming this is an indoor grow?
Peace

well actually I haven't started the grow yet just trying to get all the information I can first so I don't fuck something up and waste some money.But yes this is an indoor grow and I was just going to use some little plastic cups till I had to transplant.
1.Do you think it will be better to use a little pots instead of plastic cups?
2.where is the best place to get foxfarm?
3. I was going to use four 6500k blue spectrum for vegging and one 150 watt hps from home depot for flowering on TWO plants in about a 2x2 space and 5-6 feet tall is this ok?

meant to say using four 6500 blue spectrum CFL's