Hi and welcome to the forum! Glad to have you. First off, you can't technically tone a muscle. To get the "toned" you need to build muscle and then lose the fat that's covering them. But it sounds like you're mostly looking to build muscle. Not sure if you have any fears of building too much muscle, but if you do, fear not. Women are not designed to build muscle. You'll find it's a big challenge to build any.
If you're a newbie to weight training I suggest using a personal trainer if you can to get you started. They may also be able to make nutritional recomendations. You should make sure you're working every muscle group. If you've never weight trained you will want to start off with your weights being fairly light until you get used to it. Then, start increasing to heavier and heavier weights. Also, you will need to eat extra calories. Lots of lean proteins and complex carbs. The body builds muscle from the extra calories.
Hope that helps. Any more questions and I would be glad to help!
Sarah