You actually "pay" the initial margin for each emini contract, which really is "a good faith deposit". The exchange(CME)<a href="http://www.cme.com/httpwrapper.cfm?wrap=%2Fwrappedpages%2Fclearing%2Fpbrates%2FPBISOutrightEQ%2Ehtm&beginAfterRE=%3Cbody%5B%5E%3E%5D%2B%3E&endBeforeRE=%3C%2Fbody">minimum initial margin</a> requirement is calculated and updated by CME every couple of months. But the final decision of what the initial margin will be, belongs to your futures broker, which may require higher than the exchange minimum margin. Some brokers can also offer lower intraday "daytrading" futures margin.
Keep in mind that Futures are a contract, while a stock is a share in the ownership of an incorporated company. When you buy futures, you buy a contract, an obligation to buy or sell the underlying instrument in the future. That's why the stock margin is percent of your ownership(price of stock), while futures initial margin is a fixed "good faith deposit", determined by your broker, which guarantees that you'll meet your futures contractual obligation.
2)i've got charting ok...is there such a thing similiar to level 2 on these?
Yes, it's usually called "Market depth" and it shows the top 5 levels of emini bids and asks. Brokers usually provide it as a free service.
Fohat