Depending on where you're located, you may be able to get the majority of the information from public records. In TX, you have both judicial and non-judicial foreclosure process. Depending on which one, the process is different and how you go about acquiring the property will differ as well. Non-judicial is usually much quicker than judicial and you don't have as much time to negotiate with the sellers, and consequently the lenders. If you are working with a foreclosure in the judicial process, the timeline can extend several months - even years (one of our sellers is going on 18 months with no sale date in sight).
I would contact a local Realtor or attend you local Real Estate Investors association to find out what the typical process is in your specific location. Often times, they will have access to foreclosure services, many of which will offer you a free trial to get your feet wet and see what information they provide.