I am planning to
-not use dummies - nice plan. I tried, succeeded with my first DS, but my 2nd DS just cried and cried and cried unless he was attached to my breast or to a dummy - after 12 straight hours of breastfeeding (I kid you not) I gave in with a dummy.
-not let my kids eat junk food - nice idea, but do you never eat junk food? Take away chinese or pizza? Ever????
-no disney - good luck, very widespread and are probably the easiest things to actually use as you know they have been checked incredibly carefully and won't contain age inappropriate things.
-no barbies/bratz - yeah, just wait till they get them as presents, what will you do then, confiscate it?
-extra homework most evenings - good idea, but will you be there every evening to supervise? Will you hire a tutor? Exactly how will you do this?
-chidren will learn another language -do you speak another language? If you do, do you make sure you practise it regularly?
-same with musical instrument - do you still play regularly?
-computer games/tv etc limited to weekends - not a bad idea, but I agree with a previous poster. My nephew became glued to the tv/computer game when he was allowed access on the weekend.
-to grow vegetables with my DC - do you do that now? If it's a chore for you, your DC aren't exactly going to enjoy it. If you do it anyway, then they'll love doing it to spend time with you when they're younger. When they're older, meh, just hope some of it sticks.
-take them to museums regularly - do you do that yourself? If you don't then it's unlikely you will do this except to keep busy.
-read with them/to them everynight - nice idea, and lovely as a concept and something a lot of parents TRY to do, but honestly, give yourself some leeway here! Late nights, busy nights, etc, you might just be too exhausted.
-cook with them regularly - again, nice idea, and if you cook yourself that's easier. But if you don't enjoy cooking yourself, or if you have a busy lifestyle that's not exactly going to be easy.
-To say no and mean no and have high expecations of behaviour at all times. - Absolutely, but just remember that you are human, and that it's easier said than done. How willing are you going to be to give something up yourself, or to to take several children away from something just because one child is being a completely and utter little shit?! Expect the behaviour, but also expect to have to punish often enough because you just don't get that great behaviour.
You're not being VERY unreasonable, but a bit unrealistic if you think you're going to manage everything with your child. You need to work out which of those things on your list are more important than others and prioritise those activities.