Oil leak could be valve cover gasket. Is it leaking by
half moon section in the center of the head, above
timing cover??? As for changing the belt it is quite easy.
$200 cdn - $127 usd seems high. Many posts how to do it in the archives. Belt I believe is <$30.00 usd.
Coolant is cheap and you only need one gallon. Should be
changed if more than 30,000 mi or 2 years. Check your
service records if you have them.