kimpa, Lemon Mint (M. citriodora) has the pinkish-purple flowers you described. Spotted beebalm has distinct spotted yellow flowers accompanied by the soft lavender-pink to white bracts. I believe the bracts may fade a bit from sun exposure accounting for some variation in color. Below is a resource for m. punctata. Good luck! Here is a link that might be useful: seed resource

A rich source of nectar late in the year. In its natural habitat it is an important plant for butterflies and other insects as they go into the winter. The flowers in the picture are nearly over and the berries are beginning to swell. They will eventually be black and very decorative - but the reason it is such a successful invader in N America.

Hmmm....I would guess either Jerusalem artichoke like Eric suggested, or maybe Maximilian sunflower(Helianthus masimiliani, a perennial type which I grew in my last garden. I'll put a link to a picture of a Maximilian sunflower below. Let us know what you think, and/or if you get a positive ID. Take care (and nice pic by the way), Grant Here is a link that might be useful: Pic of Maximilian sunflower

First is Jewelweed. Really good for butterflys and hummers. Also great to spread on your skin if you get poison ivy. Always try on your skin before using to see if you have a problem with the gel. Second is a type of dock. Use a long knife and cut the roots way underground. If the root turns yellow it is similar to the burdock that you can purchase in many grocery stores. 3 I am not certain but appears similar to Virginia Bluebells. However you have a much worse problem at the base of the picture, vinca. Vinca will take over everything including climbing trees and will with time be the only plant there. We have it across the street and other than providing cover for a few creatures there is no use for it. 4-5 Your plant may be lesser celadine because you mention flowers. Rather than getting rid of the things you have pictured most would be trying to divide to have more to plant.