A little bit more of my experience...
The Metformin and Gliclazide are to reduce your glucose levels, they work in slightly different ways but you'll find a lot of information on these on the site. By reducing my carbs I did manage to drop one of my gliclizide tablets for a while, but for some reason have had to go back up to two over the last few months (putting this down to less activity during the colder weather). I hope you have been given a meter to monitor your BG levels as this will be your most important tool and friend for the fore seeable future.
I found the Ramipril had little effect, Dr kept upping the concentration and the Blood pressure stayed where it was regrdless (watch out for 'white coat syndrome). The side effects listed look nasty so I wasn't comfortable taking it, I have found that exercise, relaxation/meditation and deep breathing are just as, if not more effective and at the last check up got the Dr approval to drop them as I'd kept good levels for last two check ups without them.
Aspirin is to thin your blood and reduce possibilities of clotting, the jury is out and divided on the need and effectiveness of this. For me Aspirin had some strange effects on my stomach (Dr would not believe) It made me very constipated and I proved this by stopping and starting it several times. I have now dropped this too.
The simvastatin is to reduce your cholesterol levels. Like many people I found I could not tolerate this, it left me feeling worse than having the flu, aching muscles spinning head. Just started on Atorvastatin which so far (4 days) seems to be tollerated better, but won't know if it has reduced my levels for a few months yet.
That's the tablets and me, you may have a very different experience, the practical aspects of taking them and re-ordering them is another issue, keep organised is the only advise I can give you and I just wish I could take my own advise. Make sure you have enough for weekends, bank holidays and if you go away on holiday - it is a whole new world, take care, good luck and good health.