jfobel,
Little slice of heaven you got there.
If you go to the "projects" forum and search on road building, you will find a lot of stuff on getting your driveway in shape. Basically, you need to remove the organic top layer (it will break down over time and the road will sag / pothole), then put down geo-textile fabric, then various layers of different sized stone to get the roadway 4-6" above the grade. A box blade is a good tool for road work. (in "Attachments" search for box blade and you will find more information than you could have imagined.)
On the ground, first take a dozen soil samples for analysis, then mow it down. Then add whatever amendments that are needed. (for lime I like to add 2/3 of the recommended amount before working the soil then 2/3 after working it. Yeah, that's 4/3rd, I know. But you are putting it in more soil and getting it down deeper). Then buy a 5' or 6' double disc and disk the field. If you don't want to spend the money on a disc (cheapskate!) you can use the scarifiers on the box blade as a half-fast substitute. Come to think about it, you probably have a layer of caleche under the soil (or is it all hard clay?). If so, you may want to spend $200 on a middle buster / sub-soiler. Drag that around first, then disc.
You can make your own smoothing drag. Buy a roll of 6' tall chain link fence. (50' or so) Cut down a tree that is about 2' in diameter and 7' long. Unroll the fence and put the log in it. Bolt or afix the chain to the log and wind it up tight, leave about 8-10' of fence out the back. Bolt the wound up fence to the log so it can't unwind. At the end of the 8-10' remaining end, bolt a section of log or post 12" in diameter. Use eyelet bolts in the big log to connect a short chain between the end of the log and the 3pt arms. You drag the sucker around and around and around. The rough bottom will break up the dirt clods and smooth it out. This is used after the box blade has rough'ed it in. The box moves dirt from high to low, this will smooth it all out.
You may need to thin out some of the trees to get more light for lawn. I'd check with the local home centers and the ag extension office on what grass grows best in your area.
Have fun,
jb