Volvo Repair: squeak and things, proper diagnosis, electrical problem

Question
240 1985 99,000 miles

start her up.  and first time i push the brakes it
squeals...after a couple more pumps of the brakes (while
moving) the squeaking subsides...the brakes wer ejust re
done?!  any idea?  
also, start it up...it cuts off..when i first put it in drive...put
it back in park..start it up...adn it is fine.?!!

finally, ac wasnt working...had it "recharged (freon)"  
$160....lasted one week...now, no Ac...the volvo guiy in
town said...oh, because we put in ultarviolent tester...and it
showed no leaks..tha means it must be the (something),
and will be about $600!!!! to fix.  What?  can you help with
any of this..I really aprreciate it.  Thanks.  John

Answer
depends on what kind of brakes they were if they were not volvo I would not use them.

the stalling may be the throttle body needs cleaned and adjusted properlyI would start with that first

I would find another volvo guy.if there is no freon in the system there must be a leak if there is freon in it then there could be an electrical problem.it should really be looked at for a proper diagnosis.I would find someone else to maybe look at it.