Dear sir,
I'm Malaysian citizen currently studying in Odessa, Ukraine. I'm planning to go for 'Transsiberian train Trip' from Moscow to Beijing (via Mongolia) for summer holiday next year. And from Beijing, I'll go directly to my country, Malaysia for the rest of my holiday. My questions are;

1-For how long i can stay with the 'single-entry visa'?
2-Can i(Malaysian) apply this visa from your embassy in Odessa?
3-Do i need to show the arriving/departing tickets for visa application?

Thanks in advance.