Few questions about SEP and SEPM

Hello, i started to testing SEP for our organization, and it have much difficulty

1. How can i installate SEP client to our PCs with use ADDS OU, where i choose OU with users' PCs, and SEPM automaticly installate clients to the stations, after that i want to SEPM  will automatilcy monitoring this OU and after adding new PC to the OU clients automaticly will be installate.And first question is very important, how can i automatically deploy clients to select OU

2. How can i use automatic update clients by using only SEPM server without LiveUpdate inside our organization

3. How can i change clients' manage server to other manage server. I need to transfer (migrate) clients to other SEPM server