MAGENTO DEFAULT THEME MODIFICATIONS

I have a magento 1.8.0.0 shop. I need the following modifications : 1. Install in frontend greek language (for example in cart has to display in greek items, or when the user registers, right now is default english which is bad ) I can help with the exact translation with that 2. Fix a menu, somehow displays a strange dot 3. The search button looks somehow wrong, has to be aligned next to the item, not below 4. We have an extra shippment cost for postal code. But the ranges are specific 10000 to 19999 = 3,50euro 20000 to 29999 = 5,50euro 30000 to 39999 = 4,50euro 40000 to 49999 = 4,30euro 50000 to 59999 = 3,50euro 60000 to 69999 = 4,40euro 70000 to 79999 = 5,00euro 80000 to 89999 = 5,10euro * for this task (4) you will tell me where to go to change the prices 5. Extra charge for total weight (gr). The ranges are specific 0 to 999 = 2,00euro 1000 to 1999 = 2,10euro 2000 to 2999 = 2,20euro 3000 to 3999 = 3,00euro 4000 to 4999 = 4,00euro 5000 to 4499 = 5,00euro 7500 to 9999 = 6,00euro 10000 to 19999 = 8,50euro 20000 and over = 12,50euro * for this task (5) you will tell me where to go to change the prices 6. I need an autoresponder so the visitor has to give the email and to that email a specific pdf will be send. Of course I can change that pdf in the future. 7. Is there any way so we can add a field in a product so to display a youtube video, or show me a way to do this if there is not such mechanism I attach the pdf with the site url and some screenshots I am looking for a fixed price and to be honest not high expectations. But finding a reliable magento developer more tasks directly to him