From my experience, most of the on air staff at any radio station that is sold is generally considered as representing an 'old' image to the listening public. One buys a station because the buyer things that can improve the station, at least economically. Usually they have a detailed business plan. Typically the business plan is an 'out with the old, in with the new' plan.
You'd get very, very little notice because of how things work. Once the deal is worked out, the FCC paperwork is filed and once approvedm the new owner wants to take the station yesterday. Since the new owner has no right to communicate with the staff since the new owner does not have approval to own the station, the staff gets minutes to hours of notice.
Likely the best way for a transfer to work would be for the new owner to lease the station until the FCC approves the sale. A lease would not be an immediate thing and allow staff to 'buy some time' in their search for a new radio job.
I'd think it in your best interest to consider and ownership change or even change of PD as a signal to find another position elsewhere.
I refused to fire everyone at one station and bring in my own. I didn't want to create economic problems for so many. I should have fired everyone. The people I hired were so loyal to me and so hard working, pitching in to get things done without even wanting extra pay. Meanwhile, the staff I left in place felt one of their own should have had my position, so they worked against me for 6 months until they did enough to make the owners want to make a change.