Yes but not enough.
Stop being cheap and buy HL2.
Buy Orange Box from local games retailer > Steam > Activate Product > Enter CD-Key > ??? > profit
nor my parent's permission. No dice.
You need the Source SDK. Buy Portal if you can't play M rated games, you still get the content from Half Life 2. (Though it doesn't include some models and it doesn't include HL2's maps.)
Got that (free) already