Hello Joe, welcome aboard.
Here's some ballpark figures. If you search the forums you can find all the info you're looking for and probably much more accurate than my numbers.
front grill star - $800
heater controls are broken - ?
seats need to be restuffed - $200 for labor
map pockets are ripped $100 labor + Materials
becker radio - $370 (Just got one a couple months back with an Ipod jack included)
period correct wheels - $200 for wheels only... do you need rims and hubcaps too?
tools - $100+ for repros / spare - $50 for a wheel / manual - $30 ebay
As far as areas to look for rust damage, you should focus on underneath in general, behind the headlight buckets and underneath the front quarter panels. Check the sills on both sides, as well as footwells and floor trunk. As far as I know, structural rust comes after these areas are affected, so if these are rusty, then look in further depth. Search the word "rust" and read away.
Cheers!
Andres