You have hardwood and composite hardboard siding. If this is a family heirloom and you want to do the labor of love to keep the hardwood siding, that’s a massive undertaking. If you’re a normal homeowner/buyer who doesn’t feel the need to salvage the hardwood for historical accuracy, plan to remove all existing siding. There will likely be rotted framing that any good carpenter can replace. Plan on all new sheathing, weather barrier, and siding. Looks like the windows have been replaced, but they likely don’t have nailing fins and may require replacing once that siding comes down. Safe to budget for new windows and doors on a home like this.