If you RP surrender in any way (get in cop car, /hail, say in /l) the same rules apply as if you /gu - You are not allowed to run away or shoot etc. Also cops are not allowed to shoot or attack surrendered suspects or force them to /gu. Admins can be called in for abuse by either side.
Bear in mind... /gu is for your own safety. So if you decide to /hail in the middle of a massive shootout and cry to admins when you are killed, you will just be laughed at. Admins do not have any command to remedy stupidity. Also accidents do happen and please have some patience with new players. If new player attacks surrendered suspect, instead of screaming at them or admins "abuse DMER FUUU"... just take 10 seconds and calmly explain to new player the rules, and most times they will not do again.
Personally I do prefer to handle suspects who do not /gu, as if they RP well I have no problem with them escaping. Luckily for me though I can cancelsuspect...
Regarding paying with RP money... expect most cops to spot fake cash and arrest you for that
