To remove the power antenna its pretty simple, just remove the inner fender wheel well and then its 2 8mm bolts, also have to remove the nut that holds the top to the fender...there's a special tool or you can use a small flat head to spin it off.
I beleive you'll need a mast repair kit to fix your issues. Its easy to install. I got one a few years back from Ford for like $15...might be discontinued now. I've seen em on ebay a few times too.
-Tim