Of the three I think the 2nd might be your better option, but you could also go with a more rustic style and placing on a dimmer is a good idea as well. It's nice to have more than one source of lighting and there are LED light pucks that can be easily stuck on under the cabinets and help as task lighting. A large antique looking clock on the wall on the right would be cute also. If you want farmhouse/rustic, the lighting and accessories will make the difference.

Yes to the third! The more lights to direct to different directions the better. I have similar kitchen layout but smaller and my track has four. It isn't enough for my small space. Think sink, stove, counters where you work, island etc. so definitely more than four! If you're used to one fixture and light source it might take time to get used to the spotlight style of a track. But I like

This etsy shop has so many unique lighting options that are perfect for a farmhouse theme! Also a good fit would be cage chandeliers. Good luck!

Check out West Ninth Vintage light fixtures! http://westninthvintage.com/

If you aren't going to move the junction box to over the island, #1 is the way to go. But that would just look weird to me. Moving it & doing a box light suggested above makes much more sense.

Will you have under cabinet lighting??? And your micro looks too low to the range.

None of those says "farmhouse" to me, and they all look very heavy for your ceiling height.

Something lighter and smaller would look better. Here are some examples: