1. I don't see why not. I'm pretty sure those pastas are just flour and water, but check the ingredients anyway just in case they changed recipes.
2. Get used to reading packages. Many margarines, including some generic brands, are vegan, but many of them are not. If you can't find a vegan margarine at Shoprite and don't like most sauces, olive oil is also good on pasta. I usually put olive oil and a spice blend on pasta if I'm not having it with sauce, or olive olil, vinegar, and spices on cold pasta for a pasta salad.