the only way to obtain bitcoin would have been getting tipped from someone or claiming a faucet and gaining 10-20 bitcoins!
Gavin Andresen's old faucet gave out five Bitcoin to each claimant.
by 2009-2010 there were no exchange/markets for buying bitcoin
Not quite. Mt. Gox started in July 2010. Bitcoin wasn't worth a lot but going into 2010 it was no longer worthless.
But yeah, you have a point.
Later in 2010, you would have bought from Mt. Gox. Before that, you might have been able to buy directly from some people (or do some
Bitcoin pizza, but it wasn't worth a lot.
It's more likely you would have mined with your CPU and/or GPU (and at first, claimed from Gavin's faucet).