I'd say $1000 is pretty high and likely is mostly labor. You can almost all of your bike maintenance yourself for a small fraction of what it costs at the bike store and if you are halfway handy you will probably do as good or better.
$1000 would probably also include things like cassettes, chainrings, chains and brake discs. Depending on the system on your bike this stuff can get quite expensive.
Er, what? Sounds crazy high, maybe $50 for tubes/pads (at huge bike shop markups) and even a very generous hourly rate for a generous 1 hour should be WAY less than half of that.
$1000 would probably also include things like cassettes, chainrings, chains and brake discs. Depending on the system on your bike this stuff can get quite expensive.