Actually you can start from here:
http://bitcoin.orgHow do I get started with bitcoins? Buy and Selling something.
Do I need to create an account at CoinBase?
What do I need to do so that someone can send me a BitCoin?
Do I need an account somewhere? How do I get that account?
What I what to be able to do, is to have my tenant pay his rent using BitCoin.
What do I have to do to get this to work?
If I need to redeem some of my BitCoins for cash, How do I do that?
Are cash redemptions reported to the IRS? Is there a paper trail?
I want to get off the grid. Will bitcoins do that for me?
Read above
No
No
No. You don't need an account
Read above
Use an exchange / sell on localbitcoin
Yes Yes
No