Hi guy! Sorry for the late response.
1) Naatkinson is correct: Tavern Brawler grants a free (opposed) grapple attempt as a bonus action when Rufio hits with an unarmed strike or improv. weapon strike.
2) In 5e, the grappler himself is not subject to the grappled condition (unlike in 3e).
3) A grappled creature can use his action to attempt to escape the grapple. But yeah, it would take his action. As noted by Spaceseeker, the grappled creature could use his action to attack instead (but he would remain grappled).
3) A grappled creature's movement is zero. But the grappler can move him. (push him into a fire or a vat of acid, off a cliff, fly up and drop him, etc)
4) A grapple doesn't automatically wrestle the target onto the ground. Rufio would have to use another attack for an opposed Shove Prone attempt. If a creature is both grappled and prone he can't get up (getting up uses half your movement, but his movement while grappled is zero).
Last edited Mar 14, 2016 11:22 am