After having it towed to a mechanic, he tells me that the brake and fuel lines are all bad and need to be replaced.
Did he give a quote on this work? If you can swing paying for that and the rear strut you can start driving it.
Is this a daily driver? If so you should not put anything into it and try to sell it to someone for whatever you can get and buy yourself a rust free toyota Rav4 or whatever gets you back and forth to work.
If its not a daily driver and the brake and fuel lines along with the strut work is not too big a price tag then wait a few weeks and get it fix. Yes you'll always be battling broken bolts from the rust but you'll still get some good years out of it.
Watch a few South Main Auto videos on youtube and you'll see that rust just makes things more difficult and expensive.