Message 2 - more pics
The first looks like a desirable perennial flower, but we're uncertain which one (many have similar leaves.) We recommend that you let it grow and send us a photo of the flower when it blooms for a positive identification.
The second is the seedling of a tulip poplar tree. This is a good, native tree--very large.
The third looks like a black walnut tree. Black walnut trees are native and good for wildlife, but their roots have a toxin (juglone) which can kill many plants near the tree. If you plan to grow other plants in the vicinity, you'll probably want to dig up this one.