When should this be transplanted
Depends on how fast it grows. Sorry, no concrete answer for this. Hopefully you have drainage holes in the bottom of the cup. When the roots start coming out the bottom, it's time to transplant.

is a 1x1 cube pot going to be large enough
1 foot x 1 foot I'm guessing? How many gallons? Might be a little too large for the first transplant. I like to re-pot 4 times, ending with a transplant into a 4 gallon a week or two into flowering. Having 5 gallon containers for the last transplant is a pretty safe bet. Tough to say without knowing the strain and flowering time, as this dictates the size of the pot needed (also veg time). More info here: http://boards.cannabis.com/basic-gro...ency-baby.html

when do I need to get a metal halide light
Wait until it's about 5 nodes, and start with the light much higher than optimum and gradually lower it to your plant. The increased light could be stressful at first to your plant. Be sure to check on temperatures and that there is plenty of airflow also.

when do I have to be concerned about the smell and what might cover the smell???
Best is to use a carbon filter to scrub the air. Google it and you can find many DIY's, even on this site: http://boards.cannabis.com/grow-faqs...on-filter.html

This will be growing in a small storage closet within my home, 4x4x8 will this be large enough?
Should be plenty of space.

My next suggestion is to read, read, and read some more. So much info out there but it will take a lot of time and effort to digest it all, and a grow to put that theory into knowledge. Browse around these forums in the Basic Growing sections, Indoor Growing sections, Grow Room setup, Lighting... etc. and read through all the stickies and FAQ's. If you are stuck, there is almost always someone here to help you (but your own efforts will go a long way to earning respect here).

Good luck and happy growing :jointsmile: