Well, I've had both hips replaced. The latest one was July 16, 2012. Something you can do before the surgery is get a raised toilet seat (a necessity). Also, you can use your walker (which you will also need) to sit down and stand up from the toilet. Or you can purchase an item that remains on the toilet and is under the raised seat. It has arm supports so you can list yourself. I can't explain it well here, but it is self explanatory when you see the directions.
I had two weeks of in home physical therapy,and after that, I was on my own. I had easy access to the therapists, however, if I needed them. Luckily, I didn't. They were excellent and really got me going on the right path. And they kept in touch by phone after the two weeks.
It's important that you follow the "don 'ts", which your doctor/nurse will explain to you. There is a way to sit down and stand up after surgery. Also, stairs. Just think of this....UP WITH THE GOOD, DOWN WITH THE BAD. That says it all. In other words, when you're going up the stairs, start with the good leg, and when going down stairs, start with the "bad" leg. And you have to have a railing. That is VERY important.
In and out of a car can be easy. Hopefully you have a passenger car seat that you can almost put it down into a prone position. Also, the entire seat should be back as far as possible. This makes it easier to slide in and out without putting a lot of pressure on the hip.
Again, you will be informed of these things, I'm sure. But also remember that some doctors do it differently than others. Listen to what your physician suggests. They know best for your situation.
I hope this helps. Good luck and keep us informed on how you're doing, OK? They have made such great advances in this type of surgery over the years. I had my first one done 8 years ago, and it was way, way different then. Same surgeon too.
God bless.