Ace Hardware in my area is selling a 110 gallon pond for 61.99, which is the cheapest Ive ever seen a pond that size. Im thinkin of going for it.

What size pump will I need to circulate the water? I think the output is going to be about 3 feet above where the actual pumps rests, if that matters.

I guess I will have the pump about 10 inches below the surface of the water, and my filter is going to be about 2 feet high...maybe a little less...it depends on what container I have available at the time.

Any suggestions please? Thanks so much!

In that case I'd rather go with the kind of filter you are having, Gia. With pond filters, it says it on the package what kind of pump they need.
As an example, the smaller fishmate filters I use need a pump that doesn't pump more than 500 gl/h, otherwise water comes out in every spot. Now, my filters sit about 2 ft above the pond, and I happen to like the Surge pumps (I don't think they are made anymore). On the package of the pumps there was a diagram on what size of pump pums how many gallons at what height, and all you had to do is pick the right sized pump accordingly.
Remember that only height is important when buying a pump, not how far away the filter is horizontally. Theoretically you could feed a filter that is 20 feet away, as long as its at the same height than the pond. Once the pump has to pump upwards, its a whole different story. I think its called "head".

Edit: Forgot to mention that most gallon ratings on those filters are meant for water gardens, not pond filled with ammonia producing fish. On my fishmates it said "good for up to 1000 gl ponds". If there are fish in it, it cuts the gallons in half right there, and a filter made for a 1000 gl water garden is only good for a 500 gl fish pond.

Well.........I wanted to make my own filter. Maybe if I get an adjustable kind it would be helpful??? I saw some on eBay that you could make slower if you need it to be so that water doesnt go shooting everywhere lol!!! Ok...say.....my filter is 5 gallons, and my pond is 110 gallons, and I will need the water to pump (vertically) 3 feet, what would be the maximum to get to be safe but not overkill???? Because if I get a kind that I can turn down to make less powerfull, it would be ok if I got one that was a little more powerful just in case...but obviously I dont want to go overkill and spend more than I need....help???

EDIT: btw, do you think a 5 gallon filter is large enough for a pond that size?