Hi David, my answers in your mail  below:

Not true. I have friends who applied with full family for visas in India and moved with their families to Germany. As long as you can prove that you earn enough and will be able to have accommodation for all family members, you can apply jointly for visas.
Not true. I started working within a couple of days of arriving in Germany. The temporary visa contains work authorization.Not required if you apply together.
This really varies from place to place. I got mine quite quickly. But people I know had to wait some months esp if you apply for the full family.

Hi,
I think you have no choice when you apply for a visa. It is usually a 3-6 month validity National visa which contains work authorization. When you arrive in Germany you can apply for a Blue card.

Thanks OMKAR for the information. I need to get in touch again with the consulate here and see if they can help.
My employer-to-be is kind of not taking any responsibility in the visa process. The main reason is because they don't have the experience. In other words I have to take care of the visa process on my own both now and in the future. This somehow scares me because I am not sure what happens throughout the process and whether I can do it alone.
What do you generally think about this? Are there anything specific they will have to take responsibility for? I mean other than providing the job offer. I want to delegate some stuff to them if possible just to also get a feeling how responsible they are about this visa process.
I have two more questions:
-Question 1: I heard other than the EU Blue Card, there is also a "work authorization" my employer is to get best in advance. here is more information: https://www.arbeitsagentur.de/web/content/EN/WorkingandJobSeeking/WorkinginGermany/Detail/index.htm?dfContentId=L6019022DSTBAI776745
any idea what this is?
-Question 2: After getting the 3-month short term visa I have to quit my job here and leave for Germany. Is this shor term visa also a guaranty that I will get my Blue Card? How can I reduce the risk of both losing my job here and also not getting the Blue Card there when I apply for it in Germany?

Thanks in advance. 

Hi Omkar,
Thanks!

I will be applying from Singapore. I have an Indian Passport but eligible to apply from Singapore. And I have been informed that there is a visa type called "Entry Visa for Blue Card" which I guess is a short term work authorization but based on the fact that the candidate is eligible for blue card. For this they have asked for an approval letter from Germany - which my employer will apply for and send to me. 
Once I get that I will apply for me and my family together. 

I have a specific query on the visa form. In the form they ask about adress where you are going to stay? What is expected here? most of us will not have anything confirmed until atleast the visa is approved, isnt it? Does any one have an idea?
Thanks!

For the address you can simply put the one from your host or employer coz it is quite obvious that you will find permanent accommodation only after moving to Germany. This worked for me.

Have any idea if I need to get a separate appointment for my wife and child when visiting German embassy for interview?