new to weight training- days off?

It's going to be normal for your body to be sore with each new body part you workout. As for the skip the light weights and go straight for heavy, I don't agree at all.

Lift at a weight that you can do reps with controlled proper form. It's useless using heavy weights if you aren't doing the exercise properly.

I usually work one body part a week and fill the rest of of the week with rest days. Here's my routine:

Monday - Legs/Abs
Tuesday- rest day
Wednesday- Back/Biceps
Thursday-Abs
Friday-Shoulders/Abs
Saturday-rest day
Sunday-Chest/Triceps

Also, to get lean and toned you don't need to do so much cardio. I do none. Well, maybe about once or twice every couple of weeks when I play football.

I am a beginner and am doing this All Pro routine and really like it. Here is a link to a group that you can join or just get more information about it. It's a full body workout 3 times a week with one rest day in between.

http://www.myfitnesspal.com/groups/home/12707-all-pro-s-beginner-weight-lifting-routine

You need to follow an actual lifting program. You're not going to get much benefit just picking up random weights. Your lifting program will dictate your lifts...when to rest...when to up you weights...when to de-load, etc. Given you are a beginner you are going to get the most benefit from doing a 3x weekly full body routine, taking a day off in between each lifting day for recovery (where the magic happens). These programs focus on the big compound lifts that work everything in short order. People, and beginners in particular tend to gravitate to doing a lot of isolation and assistance work and ignore the compound lifts...thus getting minimal benefit for their effort.

Look into New Rules of Lifting for Women, Starting Strength, Stronglifts 5x5, or any of these progressive programs that are geared towards the beginner in the weight room. I do cardio on my non-lifting days. I usually do some "recovery" cardio on lifting days but I either do it after I lift or in the morning but don't lift until night. This is usually just going for a nice walk or easy bike ride or something...very low key, just moving. You don't want to do anything too intense as it will interfere with your lifting recovery.

Look into Stronglifts 5x5. It's a great program and tells you exactly what to do. And if you're concerned/embarrassed/whatever about starting out with just the bar....forget it. Check your ego at the door. As a few have already said here it's much better to get your form down before lifting "heavy"....you could really hurt yourself.