a lot help please, i am newborn with this

Hello, i bought these GSM Module and the sheild (ebay 220855397963), but how connect these to computer, what else i have to buy, my project is send text message to many customer using vb.net and i dont know what else. Please somebody tell me what I need, first of all, what type of hardware, thank you

Hello, i bought these GSM Module and the sheild

We don’t care where you bought them. Links to the devices might be useful, though.

but how connect these to computer

Just plug the shield in. That’s why you bought a shield.

Please somebody tell me what I need, first of all, what type of hardware, thank you

An Arduino and a PC would be useful. A USB cable, too.

Could you tell me what type or model of arduino is the best for this case.
thank you

Please somebody tell me what I need, first of all,

First of all you need better requirements ....

An UNO might do the trick, but if you need more memory a MEGA might be better.

... i dont know what else ...

We don't know either ....