Can you tell me how to count the combat count in rmxp?(please).

I wasn't sure exactly what you meant by combat count, but I assume you're trying to have a way to show how many times you have gone into battle. Right?

This will mainly depend on what kind of encounter system you're using. If you're just using the random-encounter system that comes with RMXP, then it'll be kinda tedious. You'd have to go into the battle events (which should be under the Monsters-Group tab in the database) and set an event to trigger after 0 turns (or 1 if it won't let you set it for 0)... The event calls a Common Event, which just increases the combat-count variable by 1. The tedious part is that you'd have to set that event for every monster-group in the game. Have fun.

If you're using an encounter system similar to Lunar: Silver Star Story, where there are no random battles but battle starts when an enemy NPC touches you... Then it's a little easier. You'd again want to create a Common Event and cause it to trigger whenever the enemy touches you. I'd stick it in the enemy's event sequence, just before the "encounter" command.

You should be able to do this in any version of RPGM, though I've never used 95. If this isn't what you meant, or if you run into problems, feel free to clarify or ask for more info.

What i meant is, can you tell me about battle algorithms.

To access the battle algorithems you have to goto the battler scripts or something like that at the higher portion of the list. You mean like where damage is calculated right? An easy way to find it is to do a search for "damage". (FYI if you don't know how to search for text you have to right click on the list of scripts on the left and click "search") I hope this helps.