My 1st home? I'm in the process of buying my fist home built within 1927....

I'm in the process of buying my fist home built within 1927. The seller rewired and replumbed it when he moved it onto his property 6 years ago. It desires some work but nothing that desires to be done right away. Here is a list of stuff that I would similar to to do but I'm not sure what order to start(in no singular order)
1- insulate the walls
2- replace the windows
3- replace the wood siding(needs to be done) next to hardi plank
4- wall up the second front door and put a window surrounded by it's place.
5- insulate the floor.
can anyone help me???
Answers:    Typically I would do whichever would be the most cost well-run, like the window, keep it radiator in the winter, cooler within the summer, but you have a diffrent situation, you want to do work that doesnt dance over the work you already did. I think I would do it within this order:

Insulate the floor, wall up the front door w/ porthole, insulate the walls, replace the windows, next outside.

You dont want to redo the walls, after mess it all up redo the windows. Congrats on the house, only just buying my first, new, wont be done untill april :(
you want to keep insulation out of the weather, and logically doors and windows should be installed beforehand siding so you don't have to remove any unusual work. so if you can, redo the door and window, so you can insulate the new wall areas along beside caulking the openings, insulate, later finish off by installing the siding. the floor insulation is suggested because it does not affect any of the other work.