IOTA is a revolutionary new Crypto Currency, a block-less distributed ledger which is scalable, lightweight and for the first time ever makes it possible to transfer value without any fees.
Get Bitcoin
The easiest way I've found is using
Coinbase ($10 free with this
link).
Trading Platform
Head over to
Bitfinex and create an account. Go to the
Deposit Page and create a new address and send over your desired trading amount by going to your
Coinbase account you just created and bought bitcoins on you need to send them to the address that you generated on Bitfinex. You do this by going to Accounts and then clicking the Send button under the wallet of the currency you purchased.
Buy IOTA
Go to the the
IOTA/BTC trading page. Using the Order Form on the left, buy as many as you want when your BTC is available.
I don not recommend you store your IOTA on an exchange so you can find a desktop wallet
here.
Good Luck.