Is it a Good idea to work 2 muscles a day? like doing bicep curls and Dumbbell Bench press(chest) on the same day cause I heard from my some of my friends that I shouldn't.

To be honest, this is very vague post. Most programs actually exercise multiple muscle at one time.

You should post your personal goal (s), and stats. From there what you have to train with, and then we can provide more.....accurate, assistance.

Be more than happy to assist you when you do.

Chillen

Well I have 2 30 pound dumb bells, a bench and a Pro-form recoil strength system.

What are your goals? What do you want out of your body?

Gain weight? Lose fat issue? Increase strength? Increase endurance, etc,etc, etc?

You may have limited equipment, but, you can develop a program for body weight exercises, and various items around the house to assist your personal goal cause.


Best regards,

Chillen

Gain strength and endurance but strength comes first I guess.

If your new to lifting you should be working all your muscles in one day, then have 2 days rest.
when your bodly has developed and you have started to gain strength and your technique and form is good, then you can look into splitting your eight training in to 2 workouts.

Training one muscle per workout is somthing that you should only be looking in to once you have been training for well over a year and you are focusing entirly on bodybuilding.

If you want strength or your weight training for a sport then you'll never want to work one muscle group a day.

What if your new to weight lifting but not new to exercising? would it still be the same?

Is it still the same If your new to weight lifting but not new to exercising like if you have been doing Pushups, Situps, Dips, Leg raises for a while?

Number 1 - Those two exercises use a lot more than just two muscles.

Number 2 - Considering your friends got part 1 completely wrong, it should make you suspicious that their whole theroy is totally wrong, and guess what, it is !

yes. because you need to get used to using the weights.
When you do a bench press the main muscles worked are your pecs and triceps.
However there are hundreds of smaller muscles which also come in to play to stabalise you.
Just like juggling balls, your body needs to learn how to do the movement safely. the only way to do this is to practice.
You'll still make gains in this first period of training, but you'll be doing it safely.

If you dont build up slowly you run the risk of pulling and ripping smaller muscles which will take a week or two week sto heal.
So in the long run, you'll make much better gains as you wont have to have 2 weeks off to let your muscles heal.

you said that I should work all my muscles but how do I work my calves, shoulders and abs through weight lifting?

I dont mean this in a rude way. But if you need to ask questions like this then you really should do some reading b4 going anywhere near the gym.

Try 'new rules of lifting', even mens health home workout bible which is pretty in depth.

Every single exercise you do in the gym wll work your shoulders, ether as a primary, secondary or stabalizer.

to answer your question, calves are worked well with squats and simular exercises. abs thru crunches, lat pull downs, woodchopers, chin ups, dips, pull overs.
With the shoulders, there are 3 major muscles in each shoulder called delts. You can easily reffer to them as front, side and rear delts.

I mean using the weights or does it not matter If I do it through weight lifting?

depends how strong you are.
if you can do more than 20crunches, then add some weight.

No. Full body routine, compound moves. 3 times a week.