Greetings 95ee32069,
if all you want to do is "test drive" the software, you can get a free download copy
here ... the biggest problem with the free software is that it will only program Allen-Bradley's smallest MicroLogix1000 processor ...
beyond that, you'll have to pay to get a legal copy of RSLogix ... before you do that, I'd suggest that you make a list of ALL of the different types of processors you'll be working with ... post that list (or have it handy when you talk to your local AB distributor) and we can help you decide which flavor of RSLogix you need to buy ... prices range from ABOUT $500 to $1,100 to $3,500 (US dollars) ... depending on which processor platform you need to work with ... some handy buzzwords: RSLogix500, RSLogix5, RSLogix5000 ... sorry but NONE of these are interchangeable ...
and incidentally ... if you're going to connect to a processor, then you're going to need some type of communications cable ... again, we need to know what type of processor (catalog number please) to help you decide what you'll need for this piece of the puzzle ...
hope this helps ... and welcome to the forum ...
PS edit ... if you decide to buy a copy of the software, I'd suggest that you do that through your local AB distributor rather than online ... if you're just getting started with this stuff, then you're going to have questions (and probably need some help) along the way ... spending money with the local distributor should get you a least a little bit of goodwill with someone who might become a very valuable resource down the road ...