I'm not entirely sure how suppressive M1T is, but generally coming off any full on steroid cycle, 4 weeks of PCT using clomid or nolvadex (or both) is sufficient to restore natural test production. You likely wont need that long from a 5 week cycle of M1T only, so i'd say maybe 2 weeks at 50mg/day, if that much. If you used clomid for the last 4 weeks of the cycle PCT shouldnt need to be too long.
As for drinking, its up to you. Theres no hard and fast rule. Everybody reacts differently to these substances. The only way to really know for sure is to have a blood test and get your liver enzyme values checked. But once again, i think thats likely overkill for this kind of cycle. The hepatoxicity of these drugs is fairly blown out of proportion. While i wouldn't recommend going on a weeklong bender at this point, if you want to go out for a couple drinks, thats likely not going to be a problem at all. If you're worried, take some milk thistle. Alcohol can lower T levels however which means heavy drinking during recovery can be counterproductive.
Cut cals whenever you feel like it. Generally one modifies their diet while on a bulking cycle so that they're eating a lot more. You will want to discontinue this once your cycle ends. Probably wait till the end of PCT at least to really cut calories so you have your test production normalized. Once again, theres no real rule here. Trial and error.
As for when you can start your next cycle, you should take time off at least equal to time on. So if you were on for 5 weeks, you should wait at least 5 weeks to begin another cycle.