One option is to look for a place around you that does chemical stripping. Take the windows apart and have them come pick them up and strip them. Most of these outfits will also prime them for you if you want. It might run a couple of hundred dollars a window but it would save you a boatload of time.
I actually found a place that will strip them for me if I take it to them but they want me to take a window to them so they can test it and see how many layers there are and what is on it. They will then give me a price.
I may go this route by take a window section out. I'll report back.
Thanks for all the suggestions from everyone. I love this forum and discussion.
Can't tell for sure, but that looks like a double hung with years of calk and paint holding it in place. If you unscrew the sash weight cover at the bottom, you will be able to tell if there are two sash weights per side.......making it a double hung.
As for taking it out...
1) remove the side and head jambs
2) remove the parting bead (not shown in this picture, but it separates the upper and lower sash.)
3) use a putty knife/utility knife, etc... to break the seal between the sash and the surrounding frame
4) if the window is still stuck in place, you may need to repeat step 3.
That's just my opinion. But it's free, so take it for what it's worth to you.