They'll compost pretty slowly if they're all leaves. They'll probably start to go down in size a little, so you can take advantage of that to start adding greens. One readily available source of greens is Starbucks. They have a corporate policy of giving out grounds for free (they save a bundle on garbage fees in the process). Dunkin Donuts are probably more numerous, but they don't have the corporate policy. You can ask and meybe they'll save the grounds for you. I've noticed that Starbucks in business districts often don't save the grounds because nobody asks for them. So if you stop and ask on a regular basis, you can get a lot. Of course, if you're riding the subway, you're limited in how much you can carry.

I wouldn't bother turning until you start adding some greens, but if you can get some coffee grounds in there, they don't take much space and they do heat the pile in a hurry.

Turning won't help anything yet- you need greens and warmer weather. A pile with not much N in it will basically stall at this time of the year (although it's the first day of winter and will hit 50F in Boston...) Shred them if they're not shredded, and if it's not too much of a hassle for you. Make sure the pile is moist all the way through- that means wetting as you build the pile. Adding water to the top won't do it- trust me- unless you find a way to inject water with a strem sprayer or pipe or something.

If you don't anticipate getting greens anytime soon- you could shred them and use as mulch now- really thick on garden beds. You could also set them aside and not think about them until spring. They will get digested very quickly once you have greens and warmer weather, so fear not about getting compost action happening.

Depends. All leaves, shredded? Whole? Was moisture added? Was more Nitrogen in some form added?
My compost piles. mostly shredded leaves but with some other plant residue and kitchen waste added along with a bit of horse manure is cooking away right well now. The second bin, only about half filled, released a lot of steam the other day when I mixed in some kitchen waste with the fork.
If you have not added some nitrogen and moisture to your mix it will still get digested, just a lot more slowly and may take a couple of years.

It does have SOME grass in it and a few pumpkins and maybe some soil from raking the leaves near a dirt area but I have not really added too many greens as of yet. Most of the leaves are whole, some shredded.

I figured I would let it sit for a while and compact and heat up a little before getting more active with it and turning it.

It has been pretty warm hear lately so maybe I will get to it this weekend.

Does not sound like there are enough greens to get the temp up much. This time of the year Starbucks is my main 'green' ingredient.

150# of used coffee grounds in a good week (dumpster diving)

In the spring fresh cut grass is my other favorite 'green'.

All that meat and no potatoes! Your bin's contents right now does not comprise what is recognized as good compost material.
Additions to a compost should be in a more balanced way....greens and browns...added as they need be.
Just leaves will not compost down for a long, long time.
Microbial action has to be activated. There is nothing in your bin to do that.

I suggest you first try to make the contents smaller...by using your weed whacker and push it into the pile of leaves to chew them up. Then remove half ...or more...and put into plastic garbage bags and set aside.
As you add kitchen scraps, lawn clippings, moisture, etc etc....then add more leaves from the bag.
Use the bag of leaves as a repository to use as needed to your bin. In this way, your bin will achieve some degree of balance to the browns and greens.
With each addition, add some soil (where the bacteria is), high nitrogen lawn fertilizer, some water, then some leaves.

That, will give you some compost in a much shorter span of time.

Leaves will take a while to become leaf mold, however that in itself is great for the soil. I have never done it myself but I know a few of the bags I dumped today that were still in black trash bags were already on their way to compost. They were in the bags for around a month.

Anyway for me the thought of adding store bought chemicals to my compost is really not the reason to compost. I compost to save some of the earths natural fertilizers from a landful. Also what could be better for the soil than what Mother nature provides rather than something man made. I also do my own composting to improve the types of food my family eats. Why garden if I can buy chemical laced foods at the grocery? I don't want to eat chemicals, feed your soil chemicals, it will be drawn up into the plants and you will eat them.

There are tons of free sources of nitrogen. Coffee grounds is a great one. Urine is another. Chopped up leaves compost faster, however whole ones also compost. Trust me I do it all the time. They just take longer.
By next spring they will not have changed all to much, but add some grass clippings and step back. In no time they will turn those leaves into black gold. I have a huge bin waiting for the greens next summer.
Sandy-who will never buy stuff for the compost pile