Translation of throttle in Spanish

How long have you being teaching Russian and why do you want to learn Spanish? Since when do you learn it? Are you traveling often and if you do in which countries? Are you from Moscow or St. Petersburg?
Could you please read the following offers in a critical manner and confirm it before I will send it? I have also mentioned the warranty and the software in the offer, because it was requested by the customer.
Your English seems to be good. Can I meet you? I made a German language course, but my vocabulary is very limited. Unfortunately I do not speak German well, but I'll give my best.