Hello, my name isXXXXX & I'll be helping you today. My goal is to give you a complete & accurate answer that you can understand.
I presume you are under 59 1/2.
You should be ok as far as the $10,000. is concerned as long as it is used for a first time home purchase. There will be no 10% early withdrawal penalty; however, it will be subject to income taxes as the $10,000. will be added to your taxable income for the year of withdrawal.
As far as the $900. is concerned you are always able to withdraw your own contributions so if you have made at least that much in contributions (money that has been taxed going in), that shouldn't be a problem; however, if at all possible I would leave the money in your Roth IRA if possible.
As far as what expenditures qualify for the first time home purchase goes, the expenditures you mention would be fine, although once the money comes out of the IRA what precisely you use those exact funds for isn't important as long as you expend at least that amount for your first time home purchase.