Usually the way it is done is that the wire rope connecting the top of the tower to the end of your gin pole (this is called "hoist side") is never removed, and the tension is always fixed by your turnbuckle. There is another turnbuckle that needs to be placed below the gin pole, and this is what attaches the gin pole to the in-ground anchor. This way, when the tower is raised vertical, your gin pole will be NEAR HORIZONTAL (in actuality, it should be at 5 - 10 degrees tilt) to allow enough room under it for the anchor turnbuckle. The turnbuckle or shackle can then be installed when it is in this position.
The lifting of the tower is usually done with two pulleys and a fixed anchor point. The hoist cable will attach temporarily to the ground anchor with a removable shackle. It then will go up into the air and wrap around a pulley (snatch block) on the end of the gin pole. the cable will then come back to the ground and wrap through another snatch block temporarily attached to the ground anchor. After it passes through the anchor, it will go to your tractor, to tension it (I use a winch normally). When you pull on this cable, it will cause the two pulleys to be pulled together (This will reduce your pull force by half) and the gin pole to be pulled toward the ground and therefore, the tower to go up.
You would normally use an "equalizer plate" on the ground anchor so that it would facilitate the connection of blocks and shackles at the same time, while still allowing you an extra center hole for the last turnbuckle to be installed when the gin pole is ready to be locked down. After it is locked down, all temporary rigging used for the lift, can be removed.
Not to confuse you more, but you should think about positioning the side guy anchor lines a few inches toward the down side anchor. This will allow your side guys to loosen slightly when you come off center with the tower and it is starting to be lowered. It might help you to not break a cable if your guys get too tight, and therefore is a little safer.
Hope I didnt make it too confusing. :-)