Thank you for your question.  The first photo is Lysimachia nummularia which is also known as moneywort, creeping jenny and twopenny.  It is a low-growing creeper that is often used as ground cover.  It can become an aggressive spreader but is not difficult to pull.  The second photo is Euphorbia cyparissias or cypress spurge.  This is an ornamental introduced from Europe in the 1800s.  This can also become an aggressive spreader so it is best to keep it in an area where it can't take over.  Finally, the third photo is of Viola sororia or wild violet.  This plant self-seeds and can spread very quickly.  Of note, both the leaves and flowers are edible.  

If you need additional identification, you can submit questions via the same process.  We do ask that you submit a new request each time.  I also suggest using a plant identification app on a cell phone.  These are quite accurate and can be a very useful tool.  Congratulations on your new property!