Welcome! First off, I'll address the appetite suppressant. Hoodia is a very popular root that you can get at pretty much any health place. I know that we sell it at GNC, but honestly, use the internet, you'll find a much better deal I'm sure. Don't know of any sites off the top of my head, so you might have to google something like "discount Hoodia." Anyway, in terms of fat burners, go for something like Lipo-6. This fat burner helps to increase liposis (or fat burning) in those more stubborn areas (i.e. butt, thighs, stomach, etc.). But remember that you ultimately have to do all the work, fat burners just help to speed up the process assuming that you're doing your part.
Yes, I can understand why some trainers might seem a bit intimidating. If you're at a big gym, there should be many to choose from. Seriously, I mean, have you already gone through every single trainer yet and didn't like one? If so, then I would suggest looking elsewhere. With a bit of searching you're bound to find a trainer that you connect well with
In the meantime, if you're curious on how to use a machine, just ask someone, anyone who looks like they know what they're doing. Believe me, people could give less of a care in the world about you asking, when they get the chance to show off their knowledge on how to use the bloomin' thing!
I understand that you want to target fatloss more in the butt and thighs, but know that spot reduction (trying to lose fat in a particular area) is rather unrealistic. I'm not saying that you won't loose from there eventually, but it may take a bit of time. In the meantime, focus on doing about 60% weight training and 40% cardio. Yes, I said more weights than cardio. Muscle burns fat in the long run, where as cardio burns a little bit of fat in a session and can actually burn muscle if endured too long (>45 mins).
As far as diet goes, just focus on getting adequate protein in your diet (about 1-2 grams per body lb). For you, that's about 121-242 grams of protein a day. It can be done! Just look into a protein supplemet to help you acheive this. Optimum Nutrition whey protein is a personal favorite of mine. It tastes good, absorbs well, and is very convinient for shakes. Other than that, find a balance in complex carbs and healthy fats. when you want to lose fat, it is more effective to lower your carbs along with your caloric intake. What I personally do is carb-cycling, which consists of going about three days with low carb intake (<60 grams) and one day with a higher carb intake (between 120-180 grams). Protein intake always stays constant. This way, you are tricking your body's metabolism so that it doesn't get used to you eating a certain way and therefore stop letting you see results.
One more thing: Start reading a fitness magazine, going to a fitness website, reading books about weight training etc. Personally, this is what I have done for the past two years. I taught myself without the help of a trainer. I managed to build almost 35 lbs of muscle over that time span because I educated myself on training, nutrition, etc. Knowlege is power!!!!