First wana say hello to everyone since its my first post 

Ok now to the topic....i have been lifting for quite a bit now, mainly in school and i noticed i was finding things easy, so i decided to work on 1 muscle group each session. Since ive been doing this the next day my arms seem to be really sore, is this a normal thing? I also worked more on my abs and felt the same sore-ness.

Also one more thing, whats the easiest way to tone muscles, if i tense my arm i can feel/see the muscle but i want it to show more when im not tensing...(if that makes any sense)

Thanks in advance.

Soreness when trying out a new routine is definitely normal- And despite what some people might tell you, it's not necessary to be sore in order to know if you've had a good workout or not. The soreness will go away, and eventually you might not even feel sore after a workout.
As far as toning goes- Technically speaking, there's no such thing- It's all about muscle gain, and fat loss. You eat a bulking diet in order to build muscle- Muscle is built from excess calories, so you need to eat more calories than your body takes in in order to bulk. When you eat like that, you're most likely going to gain some fat too. When you eat a cutting diet, to cut the fat, you take in less calories than your body needs to sustain it's current weight- As your body loses this fat from all over, the muscles you've built become much more visible. This is that "toned" look you're after, although despite what you may have heard, there are really no specific exercises to achieve that "toned" look. Commercials for ab building machines are the worst when it comes to this- Get a nice toned six pack in only thirty minutes, three times a week, etc- In order for anyone to get a six pack, they need to lower their overall body fat to about the ten per cent range or less. Doing situps or any sort of ab specific work doesn't burn fat directly from the abs- It simply builds the muscle under the abs. The amounts and types of food you eat are what determines your body fat percentage, mainly. So- If you're interested in getting that "toned" look- Head over to our nutrition forum, post something about how you eat, and ask for some advice.

Ok, thanks for the long and informative post ;) Glad the soreness is normal. Ive read before that using lighter weights helps to tone your muscles more, im guessing this is false after reading your post?

Yep cpl hit the nail right on the head.